Co-reporter:Congju Li, Yingying Yin, Bin Wang, Tao Zhou, Jiaona Wang, Jianjun Luo, Wei Tang, Ran Cao, Zuqing Yuan, Nianwu Li, Xinyu Du, Chunru Wang, Shuyu Zhao, Yuebo Liu, and Zhong Lin Wang
ACS Nano October 24, 2017 Volume 11(Issue 10) pp:10439-10439
Publication Date(Web):September 19, 2017
DOI:10.1021/acsnano.7b05626
Broadening the application area of the triboelectric nanogenerators (TENGs) is one of the research emphases in the study of the TENGs, whose output characteristic is high voltage with low current. Here we design a self-powered electrospinning system, which is composed of a rotating-disk TENG (R-TENG), a voltage-doubling rectifying circuit (VDRC), and a simple spinneret. The R-TENG can generate an alternating voltage up to 1400 V. By using a voltage-doubling rectifying circuit, a maximum constant direct voltage of 8.0 kV can be obtained under the optimal configuration and is able to power the electrospinning system for fabricating various polymer nanofibers, such as polyethylene terephthalate (PET), polyamide-6 (PA6), polyacrylonitrile (PAN), polyvinylidene difluoride (PVDF), and thermoplastic polyurethanes (TPU). The system demonstrates the capability of a TENG for high-voltage applications, such as manufacturing nanofibers by electrospinning.Keywords: electrospinning system; high voltage; nanofibers; triboelectric nanogenerator; voltage-doubling rectifying circuit;
Co-reporter:Fuwen Zhao;Shuixing Dai;Yang Wu;Qianqian Zhang;Jiayu Wang;Li Jiang;Qidan Ling;Zhixiang Wei;Wei Ma;Wei You;Chunru Wang;Xiaowei Zhan
Advanced Materials 2017 Volume 29(Issue 18) pp:
Publication Date(Web):2017/05/01
DOI:10.1002/adma.201700144
A new fluorinated nonfullerene acceptor, ITIC-Th1, has been designed and synthesized by introducing fluorine (F) atoms onto the end-capping group 1,1-dicyanomethylene-3-indanone (IC). On the one hand, incorporation of F would improve intramolecular interaction, enhance the push–pull effect between the donor unit indacenodithieno[3,2-b]thiophene and the acceptor unit IC due to electron-withdrawing effect of F, and finally adjust energy levels and reduce bandgap, which is beneficial to light harvesting and enhancing short-circuit current density (JSC). On the other hand, incorporation of F would improve intermolecular interactions through CF···S, CF···H, and CF···π noncovalent interactions and enhance electron mobility, which is beneficial to enhancing JSC and fill factor. Indeed, the results show that fluorinated ITIC-Th1 exhibits redshifted absorption, smaller optical bandgap, and higher electron mobility than the nonfluorinated ITIC-Th. Furthermore, nonfullerene organic solar cells (OSCs) based on fluorinated ITIC-Th1 electron acceptor and a wide-bandgap polymer donor FTAZ based on benzodithiophene and benzotriazole exhibit power conversion efficiency (PCE) as high as 12.1%, significantly higher than that of nonfluorinated ITIC-Th (8.88%). The PCE of 12.1% is the highest in fullerene and nonfullerene-based single-junction binary-blend OSCs. Moreover, the OSCs based on FTAZ:ITIC-Th1 show much better efficiency and better stability than the control devices based on FTAZ:PC71BM (PCE = 5.22%).
Co-reporter:Fuwen Zhao;Yang Li;Zaiyu Wang;Yang Yang;Zhen Wang;Guiying He;Jianqi Zhang;Li Jiang;Taishan Wang;Zhixiang Wei;Wei Ma;Bao Li;Andong Xia;Yongfang Li;Chunru Wang
Advanced Energy Materials 2017 Volume 7(Issue 13) pp:
Publication Date(Web):2017/07/01
DOI:10.1002/aenm.201602552
Aimed at achieving ideal morphology, illuminating morphology–performance relationship, and further improving the power conversion efficiency (PCE) of ternary polymer solar cells (TSCs), a ternary system is designed based on PTB7-Th:PffBT4T-2OD:PC71BM in this work. The PffBT4T-2OD owns large absorption cross section, proper energy levels, and good crystallinity, which enhances exciton generation, charge dissociation and transport and suppresses charge recombination, thus remarkably increasing the short-circuit current density (Jsc) and fill factor (FF). Finally, a notable PCE of 10.72% is obtained for the TSCs with 15% weight ratio of PffBT4T-2OD. As for the working mechanism, it confirmed the energy transfer from PffBT4T-2OD to PTB7-Th, which contributes to the improved exciton generation. And morphology characterization indicates that the devices with 15% PffBT4T-2OD possess both appropriate domain size (25 nm) and enhanced domain purity. Under this condition, it affords numerous D/A interface for exciton dissociation and good bicontinuous nanostructure for charge transport simultaneously. As a result, the device with 15% PffBT4T-2OD exhibits improved exciton generation, enhanced charge dissociation possibility, elevated hole mobility and inhibited charge recombination, leading to elevated Jsc (19.02 mA cm−2) and FF (72.62%) simultaneously. This work indicates that morphology optimization as well as energy transfer plays a significant role in improving TSC performance.
Co-reporter:Ying Zhang 张莹;Chunying Shu 舒春英;Mingming Zhen 甄明明;Jie Li 李杰
Science China Materials 2017 Volume 60( Issue 9) pp:866-880
Publication Date(Web):14 August 2017
DOI:10.1007/s40843-017-9079-6
Chemotherapy as an effective cancer treatment technique has been widely used in tumor therapy. However, it is still a challenge to overcome the serious side effects of chemotherapy, especially for its myelotoxicity. Here we report a novel strategy using the water soluble gadofullerene nanocrystals (GFNCs) to protect against chemotherapy injury in hepatocarcinoma bearing mice, which was induced by the commonly chemotherapeutic agent cyclophosphamide (CTX). The GFNCs were revealed to specifically accumulate in the bone marrow after intravenously injecting to mice and they exhibited excellent radical scavenging function, resulting in a prominent increase of mice blood cells and pathological improvements of the primary organs in the GFNCs (15 mg kg−1) treated mice after the CTX (60 mg kg−1) therapy. Moreover, the GFNCs maintained and even strengthened the antineoplastic activity of the CTX agent. Therefore, the GFNCs would be the promising chemoprotective agents in chemotherapy based on their high efficiency, low toxicity and metabolizable property.本文报道了一种利用金属富勒烯纳米材料实现肿瘤化疗骨髓保护的新技术. 肿瘤化疗往往会带来严重的骨髓抑制等毒副作用, 给患者 造成极大的创伤. 利用金属富勒烯纳米材料高效清除自由基、高选择性且快速富集在小鼠骨髓中的特性, 开发了基于金属富勒烯的新型化疗 辅助药物. 研究表明, 金属富勒烯实现了多方面的化疗保护效果, 对白细胞计数最高可提升166%, 对淋巴细胞最高可提升285%, 对于骨髓以及 脾脏多器官均有显著保护效果, 且未影响化疗药物的肿瘤治疗效果. 该材料是一种快速、高效、毒副作用小的新型肿瘤化疗辅助药物, 具有巨 大的发展潜力.
Co-reporter:Chong Zhao;Taishan Wang;Yongjian Li;Haibing Meng;Mingzhe Nie;Jianlei Tian;Chunru Wang
Physical Chemistry Chemical Physics 2017 vol. 19(Issue 39) pp:26846-26850
Publication Date(Web):2017/10/11
DOI:10.1039/C7CP05444K
The electron spin properties of endohedral metallofullerene molecules have broad potential applications in quantum information and magnetic induction systems due to the high stability and sensitivity. Herein, we synthesized a series of Y3N@C2n (n = 40–44) molecules and studied the hyperfine structures of their anion radicals via ESR measurements and DFT calculations. N-Hyperfine couplings were clearly observed in the ESR spectra of charged Y3N@C80 and Y3N@C86 anion radicals, which are not found in the other metallofullerenes. The ESR results revealed size-dependent spin distributions and hyperfine structures, which are sensitive to subtle changes in the carbon cage and the configuration of the yttrium nitride cluster. BOMD cluster trajectories simulations indicated that the Y3N cluster almost rotates freely in neutral Y3N@C80 but there is a certain degree of limitation in the Y3N@C80 anion.
Co-reporter:Jie Li;Fuwen Zhao;Taishan Wang;Mingzhe Nie;Jiangjun Li;Zhixiang Wei;Li Jiang;Chunru Wang
Journal of Materials Chemistry A 2017 vol. 5(Issue 3) pp:947-951
Publication Date(Web):2017/01/17
DOI:10.1039/C6TA09173C
Ethylenediamine (EDA) functionalized fullerene nanoparticles as independent electron transport layers (ETLs) for inverted polymer solar cells exhibited high electronic conductivity and low work function. Compared with ZnO, the power conversion efficiency of the devices based on PTB7-Th:PC71BM was increased from 9.1% to 10.06% with C60–EDA ETLs and to 9.49% with Gd@C82–EDA, mainly due to the greatly improved short current density.
Co-reporter:Yongjian Li;Taishan Wang;Chong Zhao;Yu Qin;Haibing Meng;Mingzhe Nie;Li Jiang;Chunru Wang
Dalton Transactions 2017 vol. 46(Issue 28) pp:8938-8941
Publication Date(Web):2017/07/18
DOI:10.1039/C7DT01761H
Endohedral lanthanide metallofullerene molecules exhibit various paramagnetic properties. In this study, we present a magnetoreception probe that can detect the magnetic properties of an endohedral metallofullerene via spin-paramagnet interaction between a nitroxide radical and Dy3N@C80. A cycloaddition reaction on the outer cage of Dy3N@C80 was employed to obtain two regioisomers linked with the nitroxide radical; the resultant adduct exhibits site-dependent signal intensity in the ESR spectra. This Dy3N@C80-nitroxide radical adduct has potential applications as a molecular compass with position-sensitive magnetoreception ability.
Co-reporter:Li-Ping Wang;Tai-Shan Wang;Xu-Dong Zhang;Jia-Yan Liang;Li Jiang;Ya-Xia Yin;Yu-Guo Guo
Journal of Materials Chemistry A 2017 vol. 5(Issue 35) pp:18464-18468
Publication Date(Web):2017/09/12
DOI:10.1039/C7TA05138G
High energy density storage systems can be achieved by utilizing a lithium metal anode in solid-state Li secondary batteries. Herein, we report for the first time the use of a lithium-free cathode coupled with lithium metal for solid-state Li metal batteries. This lithium-free cathode composed of iron oxyfluoride (FeOF) nanorods can not only reduce the consumption of lithium resources, but also provide a good electrochemical performance. After being encapsulated by a highly conductive poly(3,4-ethylenedioxythiophene) (PEDOT) nanolayer, the coated FeOF nanorods exhibit a superior cycling stability (ca. 75% capacity retention after 200 cycles at 100 mA g−1) at 60 °C in a PEA solid electrolyte. This performance demonstrates the great potential of lithium-free cathodes for application in solid-state Li metal batteries.
Co-reporter:Zhigao Lu;Ruijun Deng;Mingming Zhen;Xue Li;Toujun Zou;Yue Zhou;Mirong Guan;Ying Zhang;Yuqing Wang;Tong Yu;Chunying Shu;Chunru Wang
RSC Advances (2011-Present) 2017 vol. 7(Issue 68) pp:43125-43131
Publication Date(Web):2017/09/04
DOI:10.1039/C7RA08303C
It is important to get high-quality magnetic resonance images at high magnetic field (>3 T) for medical diagnoses. However, the efficiency of the commonly used magnetic resonance imaging (MRI) contrast agents (CAs) always decrease with the increasing of magnetic field intensity. Thus, it is necessary to design MRI CAs with high relaxivity at high magnetic field. In this study, the hydrophilic and biocompatible NaGdF4@SiO2 nanoparticles (NPs) were feasibly synthesized and exhibited highly effective T2 contrast imaging at 7 T magnetic field. Furthermore, the obtained NPs had a higher r2/r1 value than the other typical T2 CAs (such as Dy-based NPs and Fe-based NPs) at high magnetic field. The observed large r2 of the current NaGdF4@SiO2 was mainly ascribed to the increased particle sizes. For in vivo application, 250 nm NaGdF4@SiO2 (with the highest relaxivity) as T2-weighted MRI CAs was further assessed. Toxicity studies demonstrated that NaGdF4@SiO2 NPs exhibited little toxicity both in vitro and in vivo. Therefore, NaGdF4@SiO2 NPs with appropriate size could be used as high-performance T2 CAs in the high magnetic field.
Co-reporter:Zhigao Lu;Ruijun Deng;Mingming Zhen;Xue Li;Toujun Zou;Yue Zhou;Mirong Guan;Ying Zhang;Yuqing Wang;Tong Yu;Chunying Shu;Chunru Wang
RSC Advances (2011-Present) 2017 vol. 7(Issue 68) pp:43125-43131
Publication Date(Web):2017/09/04
DOI:10.1039/C7RA08303C
It is important to get high-quality magnetic resonance images at high magnetic field (>3 T) for medical diagnoses. However, the efficiency of the commonly used magnetic resonance imaging (MRI) contrast agents (CAs) always decrease with the increasing of magnetic field intensity. Thus, it is necessary to design MRI CAs with high relaxivity at high magnetic field. In this study, the hydrophilic and biocompatible NaGdF4@SiO2 nanoparticles (NPs) were feasibly synthesized and exhibited highly effective T2 contrast imaging at 7 T magnetic field. Furthermore, the obtained NPs had a higher r2/r1 value than the other typical T2 CAs (such as Dy-based NPs and Fe-based NPs) at high magnetic field. The observed large r2 of the current NaGdF4@SiO2 was mainly ascribed to the increased particle sizes. For in vivo application, 250 nm NaGdF4@SiO2 (with the highest relaxivity) as T2-weighted MRI CAs was further assessed. Toxicity studies demonstrated that NaGdF4@SiO2 NPs exhibited little toxicity both in vitro and in vivo. Therefore, NaGdF4@SiO2 NPs with appropriate size could be used as high-performance T2 CAs in the high magnetic field.
Co-reporter:Yue Zhou, Ruijun Deng, Mingming Zhen, Jie Li, Mirong Guan, Wang Jia, Xue Li, Ying Zhang, Tong Yu, Toujun Zou, Zhigao Lu, Jun Guo, Lei Sun, Chunying Shu, Chunru Wang
Biomaterials 2017 Volume 133(Volume 133) pp:
Publication Date(Web):1 July 2017
DOI:10.1016/j.biomaterials.2017.04.025
Researchers have been puzzled of the therapy of malignant tumors and the current therapeutic strategies are always accompanied by toxicity or side effects. Developing efficient nanodrugs could reduce the dosage and greatly improve the therapeutic effects in cancer treatments. Here we initially reported a novel kind of gadofullerene nanoparticles functionalized with amino acid (β-alanine), which exhibited a superior antitumor activity in hepatoma H22 models via a novel therapeutic mechanism. The involvement of β-alanine improved the tumor inhibition rate up to 76.85% for a single treatment by strengthening the interaction with radiofrequency (RF) and extending blood circulation time. It realized a highly antivascular treatment to cut off the nutrient supply of tumor cells by physically destroying the abnormal tumor blood vessels assisted by RF. In situ and real-time observation of the vascular change was conducted using the dorsal skin fold chamber model, which corresponded to the erythrocyte diapedesis in histopathological examination. The ultrastructural changes of vascular endothelial cells were further investigated by environmental scanning electron microscopy and transmission electron microscopy. Long-term toxicity evaluation showed that the GF-Ala nanoparticles could be eliminated from the mice after several days and no obvious toxicity was found to the main organs. All these encouraging results suggest GF-Ala nanoparticles are valuable for the significant therapeutic potential with high-efficacy and low-toxicity.Download high-res image (155KB)Download full-size image
Co-reporter:Li-Ping Wang, Nian-Wu Li, Tai-Shan Wang, Ya-Xia Yin, Yu-Guo Guo, Chun-Ru Wang
Electrochimica Acta 2017 Volume 244(Volume 244) pp:
Publication Date(Web):1 August 2017
DOI:10.1016/j.electacta.2017.05.072
•Using graphite fiber as a skeleton for zinc metal anodes in hybrid aqueous batteries.•After 350 cycles at 1C, a relatively low voltage hysteresis (below 50 mV) of Zn@GF has been achieved.•The growth of dendritic Zn has been significantly retarded.Zn metal with high theoretical capacity (820 mA h g−1), environmental-friendly properties and low cost is very competitive to be as an anode for aqueous batteries. However, uncontrollable growth of dendritic zinc in these batteries during plating/stripping process of zinc ions not only leads to a low Coulombic efficiency but also brings safety hazards, which have obstructed the application of secondary Zn-based batteries. Here we use high conductive carbon fiber-graphite felt (GF) as collector and electrodeposit zinc under constant voltage to fabricate a self-supported Zn@GF negative electrode. The graphite felt provides this anode larger electroactive area to transport electrons faster and loads zinc in a more event way, thus preluding the zinc plating in several specific directions. This composite anode offers an efficient solution to get a dendrite-free cycling behavior of zinc-based batteries and might be promising in advanced aqueous batteries for large-scale energy storage.
Co-reporter:Li-Ping Wang, Peng-Fei Wang, Tai-Shan Wang, Ya-Xia Yin, Yu-Guo Guo, Chun-Ru Wang
Journal of Power Sources 2017 Volume 355(Volume 355) pp:
Publication Date(Web):1 July 2017
DOI:10.1016/j.jpowsour.2017.04.049
•Using Prussian blue nanocubes as cathode materials in a hybrid aqueous batteries.•80% capacity retention after 1000 cycles has been achieved.•The reversible phase transition mechanism of Prussian blue is revealed.Rechargeable aqueous battery is very attractive as a promising alternative energy storage system, based on its safety and environmental-friendly properties. An aqueous rechargeable Na-Zn hybrid battery is assembled by using Prussian blue nanocubes and metallic zinc as cathode and anode, respectively. This Na-Zn cell delivers a high specific capacity of 73.5 mA h g−1 and a good cycling stability (ca. 80% capacity retention after 1000 cycles at 300 mA g−1) due to the impressive structure stability of Prussian blue nanocubes. These remarkable features are realized by a simple synthetic method and a feasible battery manufacturing process, which can provide guidance for the development of rechargeable batteries in a large scale.Download high-res image (228KB)Download full-size image
Co-reporter:Fuwen Zhao;Zhen Wang;Jianqi Zhang;Xiangwei Zhu;Yajie Zhang;Jin Fang;Dan Deng;Zhixiang Wei;Yongfang Li;Li Jiang;Chunru Wang
Advanced Energy Materials 2016 Volume 6( Issue 9) pp:
Publication Date(Web):
DOI:10.1002/aenm.201502120
Co-reporter:Jie Li, Mirong Guan, Taishan Wang, Mingming Zhen, Fuwen Zhao, Chunying Shu, and Chunru Wang
ACS Applied Materials & Interfaces 2016 Volume 8(Issue 39) pp:25770
Publication Date(Web):September 9, 2016
DOI:10.1021/acsami.6b08659
It is important to maintain a reactive oxygen species (ROS) balance in organisms; thus, a valid ROS scavenger with good biocompatibility is urgently required. To prepare a high-efficiency ROS scavenger, multiple ethylenediamine (EDA) groups are bonded for the first time to a metallofullerene Gd@C82 to obtain water-soluble Gd@C82-(EDA)8 nanoparticles (NPs) through a facile solid–liquid reaction. Gd@C82-(EDA)8 NPs with a relatively better conjugation possess an excellent capability to scavenge hydroxyl radicals. Moreover, Gd@C82-(EDA)8 NPs exhibited a remarkable cytoprotective effect against H2O2-induced injuries to human epidermal keratinocytes-adult (HEK-a) cells at a low concentration of 2.5 μM. In contrast, Gd@C82-(OH)26 NPs that modified with hydroxyls show an apparent protective effect at a much higher concentration of 40 μM. This outstanding cytoprotective performance of Gd@C82-(EDA)8 NPs is mainly attributed to their extremely high cellular uptake and comparably strong conjugation. Gd@C82-(EDA)8 NPs with good biocompatibility exhibit excellent ROS scavenging capability even at a significantly low concentration, which promotes its versatile applications in cosmetics and biomedicine.Keywords: cellular uptake; conjugation; cytoprotective effect; Gd@C82-(EDA)8 nanoparticles; ROS scavenger
Co-reporter:Jie Li, Taishan Wang, Yongqiang Feng, Ying Zhang, Mingming Zhen, Chunying Shu, Li Jiang, Yuqing Wang and Chunru Wang
Dalton Transactions 2016 vol. 45(Issue 21) pp:8696-8699
Publication Date(Web):30 Mar 2016
DOI:10.1039/C6DT00223D
A new water-soluble gadolinium metallofullerenol was prepared through a solid–liquid reaction. It was characterized to have an enhanced effective magnetic moment, and improved T1-weighted relaxivity and magnetic resonance imaging performance in the liver. This material prepared by a facile method has wide application as a contrast agent and biological medicine.
Co-reporter:Yongqiang Feng; Taishan Wang; Yongjian Li; Jie Li; Jingyi Wu; Bo Wu; Li Jiang;Chunru Wang
Journal of the American Chemical Society 2015 Volume 137(Issue 47) pp:15055-15060
Publication Date(Web):November 13, 2015
DOI:10.1021/jacs.5b10796
Paramagnetic endohedral fullerenes are ideal candidates for quantum information processing and high-density data storage due to their protected spins with particularly high stability. Herein, we report a solid spin system based on a paramagnetic metallofullerene Y2@C79N through incarcerating it into the cage-shaped pores of a metal–organic framework (MOF-177). In this kind of guest and host complex, the Y2@C79N molecules inside the pores of MOF crystal show axisymmetric paramagnetic property. It was found that the pores of MOF-177 crystal play an important role in dispersing the Y2@C79N molecules as well as in steering their electron spin. The group of arranged Y2@C79N molecules and their electron spins in MOF crystals are potential quantum bits for quantum information science and data storage. Moreover, this kind of solid spin system can be used as a probe for nanoscale nuclear magnetic resonance or for motion imaging of a single biomolecule.
Co-reporter:Bo Wu; Jiahua Hu; Peng Cui; Li Jiang; Zongwei Chen; Qun Zhang; Chunru Wang;Yi Luo
Journal of the American Chemical Society 2015 Volume 137(Issue 27) pp:8769-8774
Publication Date(Web):June 22, 2015
DOI:10.1021/jacs.5b03612
Endohedral metallofullerenes (EMFs) have become an important class of molecular materials for optoelectronic applications. The performance of EMFs is known to be dependent on their symmetries and characters of the substituents, but the underlying electron dynamics remain unclear. Here we report a systematic study on several scandium EMFs and representative derivatives to examine the cage symmetry and substituent effects on their photoexcited electron dynamics using ultrafast transient absorption spectroscopy. Our attention is focused on the visible-light (530 nm as a demonstration) photoexcited electron dynamics, which is of broad interest to visible-light solar energy harvesting but is considered to be quite complicated as the visible-light photons would promote the system to a high-lying energy region where dense manifolds of electronic states locate. Our ultrafast spectroscopy study enables a full mapping of the photoinduced deactivation channels involved and reveals that the long-lived triplet exciton plays a decisive role in controlling the photoexcited electron dynamics under certain conditions. More importantly, it is found that the opening of the triplet channels is highly correlated to the fullerene cage symmetry as well as the electronic character of the substituents.
Co-reporter:Yanjun Zhang, Li Jiang and Chunru Wang
Nanoscale 2015 vol. 7(Issue 28) pp:11940-11944
Publication Date(Web):19 Jun 2015
DOI:10.1039/C5NR03093E
A porous Sn@C nanocomposite was prepared via a facile hydrothermal method combined with a simple post-calcination process, using stannous octoate as the Sn source and glucose as the C source. The as-prepared Sn@C nanocomposite exhibited excellent electrochemical behavior with a high reversible capacity, long cycle life and good rate capability when used as an anode material for lithium ion batteries.
Co-reporter:Xueyun Wang, Jianhua Cai, Yanjun Zhang, Lihua Li, Li Jiang and Chunru Wang
Journal of Materials Chemistry A 2015 vol. 3(Issue 22) pp:11796-11800
Publication Date(Web):15 Apr 2015
DOI:10.1039/C5TA02034D
The effects of the chemical composition on the properties, such as morphology, surface area, crystallinity and crystal structure, of magnesium titanate nanorods have been investigated. The adsorption performance of the magnesium titanate nanorods with changed chemical compositions presented a significant difference. The amorphous sample Ti/Mg-1/5-500 with the highest surface area of 152 m2 g−1 possessed the highest Pb2+ adsorption capacity of 241 mg g−1.
Co-reporter:Fuwen Zhao, Xiangyue Meng, Yongqiang Feng, Zhiwen Jin, Qing Zhou, Hui Li, Li Jiang, Jizheng Wang, Yongfang Li and Chunru Wang
Journal of Materials Chemistry A 2015 vol. 3(Issue 29) pp:14991-14995
Publication Date(Web):10 Jun 2015
DOI:10.1039/C5TA04040J
Six fractions of indene-C60 bisadducts (IC60BAs) with two indene pendants located at different positions of the C60 cage were isolated by using the HPLC technique, in which one enantiomeric mixture was purified and the structure was confirmed by single crystal XRD analysis. It was revealed that the isolated IC60BA isomers possess an elevated LUMO energy level and afford increased electron mobility, but the solar cells assembled by the isolated IC60BA isomers with P3HT did not show high performance due to a serious phase separation between them. The results suggest that for high performance polymer solar cells we should consider not only the energy level matching between the donor and acceptor materials, but also the structural matching between them.
Co-reporter:Yongqiang Feng, Taishan Wang, Junfeng Xiang, Lihua Gan, Bo Wu, Li Jiang and Chunru Wang
Dalton Transactions 2015 vol. 44(Issue 5) pp:2057-2061
Publication Date(Web):17 Dec 2014
DOI:10.1039/C4DT02892A
The internal clusters in metallofullerenes usually exhibit certain motion that is potentially usable in molecular gyroscopes and nano-machines. Based on 45Sc NMR, the motion of the scandium nitride cluster within the C80 cage was investigated via varying the temperature and modifying the cage, and by changing the cluster size.
Co-reporter:Toujun Zou, Mingming Zhen, Daiqin Chen, Ruimin Li, Mirong Guan, Chunying Shu, Hongbin Han and Chunru Wang
Dalton Transactions 2015 vol. 44(Issue 19) pp:9114-9119
Publication Date(Web):07 Apr 2015
DOI:10.1039/C4DT03482A
Manganese-porphyrin compounds as MRI contrast agents have drawn particular attention due to high relaxivities and unique biodistribution. It has been reported that the charge density of the metal center and steric decompression of the substituents, rather than rotational correlation time, were the key factors to determine the relaxivities of manganese(III) porphyrins. In this study, [6,6]-phenyl-C61-butyric acid (PC61BA) was introduced into 5-(4-aminophenyl)-10,15,20-tris (4-sulfonatophenyl) porphyrin (APTSPP) to investigate the influence on water proton relaxation. The obtained PC61BA-APTSPP-Mn possesses a relaxivity of 19.2 mM−1 s−1, which is greater than that of Mn-APTSPP (11.2 mM−1 s−1) and clinically used Gd-DTPA (4.1 mM−1 s−1) at 0.5 T, and even more effective compared with those binding manganese(III) porphyrins to certain macromolecules. It was reasonably speculated that the high relaxivity of PC61BA-APTSPP-Mn should ascribe to the charge density variation of MnIII and steric decompression induced by PC61BA. Both fluorescence emission spectra and cyclic voltammetry results verified the presence of electronic communication between PC61BA and APTSPP-Mn. In addition, the hydrodynamic diameter of PC61BA-APTSPP-Mn aggregates was much smaller than that of APTSPP-Mn aggregates, which may contribute to the higher relaxivity by inhibiting the formation of dimers of APTSPP-Mn. Therefore, the introduction of fullerene derivatives is suggested to be a good strategy for the improvement of the relaxivities of manganese(III) porphyrins.
Co-reporter:Yanjun Zhang, Li Jiang and Chunru Wang
Physical Chemistry Chemical Physics 2015 vol. 17(Issue 31) pp:20061-20065
Publication Date(Web):08 Jul 2015
DOI:10.1039/C5CP03305E
A SnO2/graphene nanocomposite was prepared via a facile solvothermal process using stannous octoate as a Sn source. The as-prepared SnO2/graphene nanocomposite exhibited excellent electrochemical behavior with a high reversible capacity, a long cycle life and a good rate capability when used as an anode material for lithium-ion batteries.
Co-reporter:Toujun Zou, Mingming Zhen, Jie Li, Daiqin Chen, Yongqiang Feng, Ruimin Li, Mirong Guan, Ying Zhang, Chunying Shu and Chunru Wang
RSC Advances 2015 vol. 5(Issue 117) pp:96253-96257
Publication Date(Web):28 Oct 2015
DOI:10.1039/C5RA16620A
Gadofullerenols have received much attention due to their high relaxivities and low-toxicity as magnetic resonance imaging (MRI) contrast agents. However, the relaxivities of gadofullerenols vary in different reports. In this study, Gd@C82(OH)xOy with different hemiketal content were synthesized and the influence of this factor on water proton relaxation was investigated. The results show that Gd@C82(OH)xOy with more hemiketals exhibit much higher relaxivities than those with fewer hemiketals. The hemiketal structure is supposed to promote the formation of intermolecular hydrogen bonds, and finally lead to large aggregates. This is consistent with a previous report that the relaxivities of endohedral gadofullerene derivatives are strongly associated with the aggregate size. Hence, this work provides an important strategy for the manipulation of the relaxivities of gadofullerene based MRI contrast agents by controlling the quantity of hemiketals on the carbon cage.
Co-reporter:Mingming Zhen;Chunying Shu;Jie Li;Guoqiang Zhang
Science China Materials 2015 Volume 58( Issue 10) pp:799-810
Publication Date(Web):2015/10/01
DOI:10.1007/s40843-015-0089-3
It has long been a dream to achieve tumor targeting therapy that can efficiently reduce the toxicity and severe side effects of conventional antitumor chemotherapeutic agents. Taking advantage of the abnormalities of tumor vasculature, we demonstrate here a new powerful tumor vascular-targeting therapeutic technique for solid cancers that applies advanced nanotechnology to cut off the nutrient supply of tumor cells by physically destroying the abnormal tumor blood vessels. Water soluble magnetic Gd@C82 nanocrystals of the chosen sizes are deliberately designed with abilities to penetrate into the leaky tumor blood vessels. By triggering the radiofrequency induced phase transition of gadofullerene nanocrystals while extravasating the tumor blood vessel, the explosive structural change of nanoparticles generates a devastating impact on abnormal tumor blood vessels, resulting in a rapid and extensive ischemia necrosis and shrinkage of the tumors. This unprecedented target-specific physiotherapy is found to work perfectly for advanced and refractory solid tumors.本文报道了一种利用金属富勒烯纳米晶体快速高效治疗肿瘤的新技术. 从生物学上肿瘤血管和正常血管在结构上存在显著差异这一特点着手, 利用材料学上金属富勒烯纳米晶体在吸收射频能量后发生相变, 伴随着体积剧烈膨胀的特性, 高选择性地摧毁肿瘤血管. 研究表明, 经过1小时治疗后, 肿瘤部位血流即可发生快速阻断, 治疗2~4小时后, 肿瘤组织逐步发生出血性坏死, 肿瘤塌陷体积缩小; 并且对于多种实体肿瘤均有显著疗效. 该技术是一种快速、广谱、特异性高、毒副作用小的新型肿瘤治疗技术, 是一种具有巨大发展潜力的肿瘤治疗技术.
Co-reporter:Taishan Wang and Chunru Wang
Accounts of Chemical Research 2014 Volume 47(Issue 2) pp:450
Publication Date(Web):December 11, 2013
DOI:10.1021/ar400156z
Fullerenes are carbon cages assembled from fused hexagons andpentagons that have closed networks and conjugated π systems. The curve of the fullerene structure requires that the constituent carbon atoms take on a pyramidal shape and produces extra strain energy. However, the highly symmetrical geometry of the fullerene decreases the surface tension in these structures, so highly symmetrical fullerenes are usually very stable. For example, C60 with icosahedral symmetry (Ih) is the most stable fullerene molecule. However, another highly symmetrical fullerene, Ih-C80, is extremely unstable. The reason for this difference is the open-shell electronic structure of Ih-C80, which has a 4-fold degenerate HOMO occupied by only two electrons. Predictably, once the degenerate HOMO of Ih-C80 accepts six more electrons, it forms a closed-shell electronic structure similar to Ih-C60 and with comparable stability. Because the hollow structure of fullerenes can encapsulate metal atoms and those internal metals can transfer electrons to the fullerene cage, the encapsulation of metal clusters may provide an ideal technique for the stabilization of the Ih-C80 fullerenes.In this Account, we focus on the molecular structures and paramagnetic properties of spherical Ih-C80 endohedral fullerenes encaging a variety of metal moieties, such as metal atoms (Mn), metal nitride (M3N), metal carbide (MnC2), metal carbonitride (M3CN), and metal oxides (M4Om). We introduce several types of endohedral metallofullerenes such as Sc4C2@Ih-C80, which exhibits a Russian-doll-like structure, and Sc3CN@Ih-C80, which encapsulates a planar metal carbonitride cluster. In addition, we emphasize the paramagnetic properties of Ih-C80-based metallofullerenes, such as Sc3C2@Ih-C80, Y2@C79N, and M3N@Ih-C80, to show how those spin-active species can present a controllable paramagnetism. This Account highlights an inspiring molecular world within the spherical Ih-C80 cages of various metallofullerenes.
Co-reporter:Xiangyue Meng;Guangyao Zhao;Qi Xu;Zhan'ao Tan;Zhuxia Zhang;Li Jiang;Chunying Shu;Chunru Wang;Yongfang Li
Advanced Functional Materials 2014 Volume 24( Issue 1) pp:158-163
Publication Date(Web):
DOI:10.1002/adfm.201301411
Fullerene bisadducts have emerged as promising electron-accepting materials because of their ability to increase the open-circuit voltage (VOC) of polymer solar cells (PSCs) due to their relatively high lowest unoccupied molecular orbital (LUMO) energy levels. It should be noted that the as-prepared fullerene bisadducts are in fact a mixture of isomers. Here, the effects of fullerene bisadduct regioisomers on photovoltaic performance are examined. The trans-2, trans-3, trans-4, and e isomers of dihydronaphthyl-based [60]fullerene bisadduct (NCBA) are isolated and used as acceptors for P3HT-based PSCs. The four NCBA isomers exhibit different absorption spectra, electrochemical properties, and electron mobilities, leading to varying PCE values of 5.8, 6.3, 5.6, and 5.5%, respectively, which are higher than that based on an NCBA mixture (5.3%), suggesting the necessity to use the individual fullerene bisadduct isomer for high-performance PSCs.
Co-reporter:Li-Hua Gan, Dingrong Deng, Yanjun Zhang, Gen Li, Xueyun Wang, Li Jiang and Chun-Ru Wang
Journal of Materials Chemistry A 2014 vol. 2(Issue 8) pp:2461-2466
Publication Date(Web):16 Dec 2013
DOI:10.1039/C3TA14242F
Novel Zn3V2O8 hexagon nanosheets were synthesized by a simple hydrothermal method and characterized by various spectroscopic techniques. The Zn3V2O8 nanosheets were revealed to show a high performance as an anode material for lithium-ion batteries with good rate capacity, high cycling stability, and excellent discharge capacity up to 1103 mA h g−1 at a 200 mA g−1 current density.
Co-reporter:Yongqiang Feng, Taishan Wang, Jingyi Wu, Zhuxia Zhang, Li Jiang, Hongbin Han and Chunru Wang
Chemical Communications 2014 vol. 50(Issue 81) pp:12166-12168
Publication Date(Web):25 Aug 2014
DOI:10.1039/C4CC05783J
A hydrogen-containing endohedral metallofullerene, Sc4C2H@Ih-C80, was synthesized and its paramagnetism was measured by the low-temperature EPR spectrometry with a broad EPR signal. The electron-spin excitation by implanting the H-atom would be a new method for preparation of stable paramagnetic metallofullerenes.
Co-reporter:Zhuxia Zhang, Taishan Wang, Bingshe Xu and Chunru Wang
Dalton Transactions 2014 vol. 43(Issue 34) pp:12871-12875
Publication Date(Web):19 Jun 2014
DOI:10.1039/C4DT01074D
A metallofullerene radical Y2@C81N was synthesized and characterized by ESR spectroscopy and ab initio calculations. It was revealed that the molecule adopts an unique azafullerene C81N cage derived from C82-C2v(9), and two yttrium ions are entrapped to form the endohedral structure. The unpaired electron of Y2@C81N radical was calculated to mainly localize on the Y2 dimer, leading to large hyperfine coupling constants of 75.7 and 69.8 G for the two yttrium nuclei.
Co-reporter:Dr. Yanjun Zhang;Dr. Yang Yan;Dr. Xueyun Wang;Dr. Gen Li;Dr. Dingrong Deng;Dr. Li Jiang; Chunying Shu ; Chunru Wang
Chemistry - A European Journal 2014 Volume 20( Issue 20) pp:6126-6130
Publication Date(Web):
DOI:10.1002/chem.201304935
Abstract
Porous Mn2O3 nanoplates were prepared by a facile polyol solution method combined with a simple post-annealing process. The porous Mn2O3 nanoplates were characterized by XRD, field-emission SEM, high-resolution TEM, and N2 adsorption/desorption isotherm measurements. The formation process for the Mn2O3 nanoplates was proposed as a morphology-conserved transformation strategy. These porous nanoplates exhibited improved electrochemical performance with excellent cycling stability and good rate capability when applied as anode materials in lithium ion batteries.
Co-reporter:Xiulin Yang, Xueyun Wang, Xianzong Liu, Yanjun Zhang, Weiguo Song, Chunying Shu, Li Jiang and Chunru Wang
Journal of Materials Chemistry A 2013 vol. 1(Issue 29) pp:8332-8337
Publication Date(Web):13 Jun 2013
DOI:10.1039/C3TA11965C
Novel graphene-like Fe2O3 nanofilms were successfully synthesized by a conventional hydrothermal method. The resulting composite showed ultrafast adsorption rates and high adsorption capacities for removal of Pb(II) and MB. Meanwhile, this material also revealed excellent photocatalytic properties.
Co-reporter:Yongqiang Feng, Taishan Wang, Jingyi Wu, Lai Feng, Junfeng Xiang, Yihan Ma, Zhuxia Zhang, Li Jiang, Chunying Shu and Chunru Wang
Nanoscale 2013 vol. 5(Issue 15) pp:6704-6707
Publication Date(Web):21 May 2013
DOI:10.1039/C3NR01739G
We present a metal carbide clusterfullerene Sc2C2@Cs(10528)–C72, whose structure has been baffling for many years. A motional endohedral Sc2C2 cluster, special molecule geometry and electronic structure were found in Sc2C2@Cs(10528)–C72. The paramagnetic Sc2C2@Cs–C72 anion radical was successfully prepared by a chemical reduction method and hyperfine couplings in the ESR spectrum were observed.
Co-reporter:Xiulin Yang, Mingming Zhen, Gen Li, Xianzong Liu, Xueyun Wang, Chunying Shu, Li Jiang and Chunru Wang
Journal of Materials Chemistry A 2013 vol. 1(Issue 28) pp:8105-8110
Publication Date(Web):10 Jun 2013
DOI:10.1039/C3TA11907F
Pd-modified fullerenol (Pd-F) composite nanoparticles (NPs) are obtained through an in situ reduction method. These Pd-F composite NPs loaded on CNTs exhibit competitive electrocatalytic activity and outstanding stability for methanol oxidation in alkaline solution, which indicate that the fullerenols in the composite catalyst play an important role in the catalytic process.
Co-reporter:Xiulin Yang, Xueyun Wang, Yongqiang Feng, Guoqiang Zhang, Taishan Wang, Weiguo Song, Chunying Shu, Li Jiang and Chunru Wang
Journal of Materials Chemistry A 2013 vol. 1(Issue 3) pp:473-477
Publication Date(Web):06 Nov 2012
DOI:10.1039/C2TA00594H
A kind of hierarchical porous magnetic Fe2O3@AlO(OH) superstructure nanomaterial was prepared by a facile method involving ethylene glycol as both cross linker and stabilizing agent. The resulting hierarchical material shows ultrafast adsorption rates and high adsorption capacities for removal of Pb(II), As(V) and Cr(VI) ions from aqueous solution.
Co-reporter:Bo Wu, Taishan Wang, Zhuxia Zhang, Yongqiang Feng, Lihua Gan, Li Jiang and Chunru Wang
Chemical Communications 2013 vol. 49(Issue 89) pp:10489-10491
Publication Date(Web):17 Sep 2013
DOI:10.1039/C3CC46247A
Sc3N@C80 fulleropyrrolidines are typical metallofullerene derivatives which were generated by the reaction of Sc3N@C80 with N-trityloxazolidinone. Here we report an effective retro-reaction of Sc3N@C80 fulleropyrrolidine by using 3-chloroperoxybenzoic acid to give pristine Sc3N@C80 in a high yield. This technique is expected to be used for separating metallofullerenes (M3N@C80) from hollow fullerenes without HPLC.
Co-reporter:Yongqiang Feng, Taishan Wang, Jingyi Wu, Yihan Ma, Zhuxia Zhang, Li Jiang, Chunhua Ge, Chunying Shu and Chunru Wang
Chemical Communications 2013 vol. 49(Issue 21) pp:2148-2150
Publication Date(Web):30 Jan 2013
DOI:10.1039/C3CC38445D
A paramagnetic Sc3NC@C80 anion radical was obtained by chemical reduction. ESR spectrometry and theoretical calculations disclosed that the core NC moiety takes possession of the unpaired electron and stabilizes the paramagnetic species. It is the first time a paramagnetic metal cyanide metallofullerene has been obtained.
Co-reporter:Qiaoling Liu, Junpeng Zheng, Mirong Guan, Xiaohong Fang, Chunru Wang, and Chunying Shu
ACS Applied Materials & Interfaces 2013 Volume 5(Issue 10) pp:4328
Publication Date(Web):April 25, 2013
DOI:10.1021/am400535j
Satellite muscle cells play an important role in regeneration of skeletal muscle. However, they are particularly vulnerable to oxidative stress. Herein, we address our efforts on the cytoprotective activities of carboxyfullerenes with different cage size (C60 vs C70) and adduct number on postmitotic muscle cell (C2C12 cell). The correlation of the structural effect on the cytoprotective capability of carboxyfullerenes was evaluated. We find that quadri-malonic acid C70 fullerene (QF70) exhibits higher capability on protecting cells from oxidative-induced stress among these tested carboxyfullerenes. The accumulation of intracellular superoxide dismutase (SOD) is proposed to play an important role in their diverse antioxidative ability. Moreover, the pretreatment of QF70 could also obviously enhance the viability of myotubes originated from oxidative-stressed C2C12 cells, which facilitates the future application of carboxyfullerenes in tissue engineering and nanomedicine.Keywords: C2C12 cell; carboxyfullerene; chemical structure; cytoprotective capability; oxidative stress;
Co-reporter:Yihan Ma, Taishan Wang, Jingyi Wu, Yongqiang Feng, Hui Li, Li Jiang, Chunying Shu, and Chunru Wang
The Journal of Physical Chemistry Letters 2013 Volume 4(Issue 3) pp:464-467
Publication Date(Web):January 15, 2013
DOI:10.1021/jz3020666
Endohedral metallofullerene species with controllable electron spin have attracted increasing attention along with their potential application in quantum information processing. In this paper, we report the electron spin manipulation via encage cluster through comparative studies on the anion radicals of metallofullerene Y2@C82-Cs, Y2C2@C82-Cs, and Sc2C2@C82-Cs. Although these three radical species have the same parent fullerene cage, we found that the unpaired spin characteristics as well as metal-spin couplings of them can be greatly affected by endohedral clusters. Furthermore, based on theoretical calculations, it was revealed that the encaged clusters can affect the electronic population of pristine endohedral metallofullerenes and eventually manipulate the spin distribution of their corresponding anion radicals. Our findings are referential to the spin coherence in information processing due to the variable paramagnetism of these metallofullerene radicals.Keywords: anion radical; carbide cluster; electron spin; metallofullerene; molecular orbitals;
Co-reporter:Dr. Mingming Zhen;Dr. Junpeng Zheng;Dr. Yifan Wang; Chunying Shu; Fabao Gao; Jing Zou; Ilmari Pyykkö; Chunru Wang
Chemistry - A European Journal 2013 Volume 19( Issue 43) pp:14675-14681
Publication Date(Web):
DOI:10.1002/chem.201301601
Abstract
The development of novel nanomaterials for the diagnosis and/or treatment of human diseases has become an important issue. In this work, a multifunctional theranostic agent was designed by covalently binding hydroxyl- and amino-bearing C60 derivatives (C60O∼10(OH)∼16(NH2)∼6(NO2)∼6⋅24 H2O) with gadolinium diethylenetriaminepentaacetic acid (Gd-DTPA) to yield C60O∼10(OH)∼16(NH2)∼6(NO2)∼6⋅24 H2O/(Gd-DTPA)3 (DF1Gd3). The obtained DF1Gd3 shows more than fourfold contrast improvement over commercial Gd-DTPA along with multiwavelength fluorescent emission for dual-modality diagnosis. An inner-ear magnetic resonance imaging (MRI) study was designed as a model of biological barriers, including the blood/brain barrier (BBB) for DF1Gd3 to investigate its in vivo behavior. This revealed that the fabricated contrast agent dramatically increases the local contrast but can not cross the middle ear/inner ear barrier and endolymph/perilymph barrier in the inner ear, and thus it is also BBB-prohibited in normal individuals. In vivo biodistribution studies suggested that 1) DF1Gd3 could circulate in vessels for a relatively long time and is mainly eliminated through liver and kidney, 2) DF1Gd3 may potentially function as a liver-specific MRI contrast agent. Interestingly, DF1Gd3 also shows an excellent quenching effect on hydroxyl radicals, as revealed by the DMPO spin trap/ESR method. The combination of enhanced MRI/FL imaging and local treatment of lesions is unique to DF1Gd3 and potentiates the medical paradigm of “detect and treat/prevent” in combating human diseases related to reactive oxygen.
Co-reporter:Li-Hua Gan, Qing Chang, Chong Zhao, Chun-Ru Wang
Chemical Physics Letters 2013 570() pp: 121-124
Publication Date(Web):
DOI:10.1016/j.cplett.2013.03.067
Co-reporter:Jun-peng Zheng, Ming-Ming Zhen, Jie-Chao Ge, Qiao-Ling Liu, Feng Jiang, Chun-Ying Shu, Hisham A. Alhadlaq, Chun-Ru Wang
Carbon 2013 65() pp: 175-180
Publication Date(Web):
DOI:10.1016/j.carbon.2013.08.011
Co-reporter:Xiangyue Meng;Wenqing Zhang;Zhan'ao Tan;Yongfang Li;Yihan Ma;Taishan Wang;Li Jiang;Chunying Shu;Chunru Wang
Advanced Functional Materials 2012 Volume 22( Issue 10) pp:2187-2193
Publication Date(Web):
DOI:10.1002/adfm.201102771
Abstract
The efficiency of polymer solar cells (PSCs) can be essentially enhanced by improving the performance of electron-acceptor materials, including by increasing the lowest unoccupied molecular orbital (LUMO) level, improving the optical absorption, and tuning the material solubility. Here, a new soluble C70 derivative, dihydronaphthyl-based C70 bisadduct (NC70BA), is synthesized and explored as acceptor in PSCs. The NC70BA has high LUMO energy level that is 0.2 eV higher than [6,6]-phenyl-C61-butyric acid methyl ester (PCBM), and displays broad light absorption in the visible region. Consequently, the PSC based on the blend of poly(3-hexylthiophene) (P3HT) and NC70BA shows a high open-circuit voltage (Voc = 0.83 V) and a high power conversion efficiency (PCE = 5.95%), which are much better than those of the P3HT:PCBM-based device (Voc = 0.60 V; PCE = 3.74%). Moreover, the amorphous nature of NC70BA effectively suppresses the thermally driven crystallization, leading to high thermal stability of the P3HT:NC70BA-based solar cell devices. It is observed that the P3HT:NC70BA-based device retains 80% of its original PCE value against thermal heating at 150 °C over 20 h. The results unambiguously indicate that the NC70BA is a promising acceptor material for practical PSCs.
Co-reporter:Jun-peng Zheng, Qiao-ling Liu, Ming-ming Zhen, Feng Jiang, Chun-ying Shu, Chan Jin, Yongji Yang, Hisham A. Alhadlaq and Chun-ru Wang
Nanoscale 2012 vol. 4(Issue 12) pp:3669-3672
Publication Date(Web):15 May 2012
DOI:10.1039/C2NR30836C
A FAR over-expressed tumor targeting multifunctional imaging probe has been fabricated based on gadofulleride nanoplatform. The combination of highly efficient MRI contrast enhancement and sensitive fluorescence imaging along with the preferential uptake toward FAR tumor cells suggest that the obtained multifunctional imaging probe possesses complementary capabilities for anatomical resolution and detection sensitivity.
Co-reporter:Mingming Zhen, Junpeng Zheng, Lei Ye, Shumu Li, Chan Jin, Kai Li, Dong Qiu, Hongbin Han, Chunying Shu, Yongji Yang, and Chunru Wang
ACS Applied Materials & Interfaces 2012 Volume 4(Issue 7) pp:3724
Publication Date(Web):June 18, 2012
DOI:10.1021/am300817z
Macromolecular magnetic resonance imaging (MRI) contrast agent Gd-DTPA-HSA (DTPA, diethylene triamine pentacetate acid; HSA, human serum albumin) as a model has been successfully conjugated with trimalonic acid modified C60 for contrast enhancement at clinically used magnetic field strength. The Gd-DTPA-HSA-C60 conjugate exhibit maximal relaxivity (r1 = 86 mM–1 s–1 at 0.5 T, 300 K) reported so far, which is much superior to that of the control Gd-DTPA-HSA (r1 = 38 mM–1 s–1) under the same condition and comparable to the theoretical maximum (r1 = 80–120 mM–1 s–1, at 20 MHz and 298 K), indicating the synergistic effect of HSA and carboxylfullerene on the increased contrast enhancement. TEM characterization reveals that both Gd-DTPA-HSA-C60 and Gd-DTPA-HSA can penetrate the cells via endocytosis and trans-membrane, respectively, suggesting the potential to sensitively image the events at the cellular and subcellular levels. In addition, the fusion of fullerene with Gd-DTPA-HSA will further endow the resulting complex with photodynamic therapy (PDT) property and thus combine the modalities of therapy (PDT) and diagnostic imaging (MRI) into one entity. More importantly, the payloaded Gd-DTPA may substitute for other more stable Gd-DOTA and HSA as a theranostic package can further work as a drug delivery carrier and effectively control drug release through proteolysis.Keywords: carboxylfullerene; contrast enhancement; intracellular imaging; macromolecular MRI contrast agents; photosensitizer; theranostics;
Co-reporter:Xiangyue Meng, Qi Xu, Wenqing Zhang, Zhan’ao Tan, Yongfang Li, Zhuxia Zhang, Li Jiang, Chunying Shu, and Chunru Wang
ACS Applied Materials & Interfaces 2012 Volume 4(Issue 11) pp:5966
Publication Date(Web):November 6, 2012
DOI:10.1021/am301629d
A series of alkoxy-substituted dihydronaphthyl-based [60]fullerene bisadduct derivatives (Cn-NCBA, n = 1–6), with the alkoxy chain length from 1 to 6 carbon atoms, were synthesized as acceptors for polymer solar cells (PSCs), for the purpose of systematically investigating the effects of fullerene derivative structures on the photovoltaic properties of PSCs. Although the absorption spectra and electrochemical properties of Cn-NCBA are almost the same, the PSCs based on P3HT:Cn-NCBA showed different photovoltaic properties. The device based on the P3HT:C3-NCBA blend demonstrated the highest power-conversion efficiency (PCE) of ca. 4.1%, while those with shorter or longer alkoxy-substituted dihydronaphthyl-based [60]fullerene bisadduct derivatives showed relatively lower PCE values. C5-NCBA and C6-NCBA with longer alkoxy chain length showed relatively low electron mobilities, leading to relatively poor photovoltaic performance. More importantly, we found that the alkoxy chain length changes the hydrophobicity of Cn-NCBA and, thus, the interfacial interaction and miscibility with P3HT, which were analyzed by interfacial tension and atomic force microscopy (AFM) measurements. The hydrophobicity of Cn-NCBA increased as the alkoxy chain length increased. A distinct phase separation for the P3HT:C1-NCBA blend film due to the large interfacial tension and poor miscibility between P3HT and C1-NCBA could be one reason for the low PCE value of the C1-NCBA-based devices. C3-NCBA may provide the most appropriate combination of electron mobility and miscibility with P3HT to achieve optimal photovoltaic properties. The current study provides the molecular structure–device performance relationship, especially with respect to the alkoxy chain length of Cn-NCBA and their interfacial interactions with P3HT, and suggests a design rule for high-performance fullerene bisadduct acceptors for PSC applications.Keywords: bisadduct fullerene; chain length; electron acceptor; electron mobility; miscibility; polymer solar cell;
Co-reporter:Yihan Ma, Taishan Wang, Jingyi Wu, Yongqiang Feng, Li Jiang, Chunying Shu and Chunru Wang
Chemical Communications 2012 vol. 48(Issue 94) pp:11570-11572
Publication Date(Web):16 Oct 2012
DOI:10.1039/C2CC36435B
Highly impressionable electron spin was found in endohedral azafullerene Y2@C79N at low temperature or upon exohedral chemical modification. These external stimulations can be employed to manipulate the spin-active Y2@C79N and can further be used in quantum processes for promising information-carrying spin systems and molecular devices.
Co-reporter:Xiangyue Meng, Wenqing Zhang, Zhan'ao Tan, Chun Du, Cuihong Li, Zhishan Bo, Yongfang Li, Xiulin Yang, Mingming Zhen, Feng Jiang, Junpeng Zheng, Taishan Wang, Li Jiang, Chunying Shu and Chunru Wang
Chemical Communications 2012 vol. 48(Issue 3) pp:425-427
Publication Date(Web):10 Nov 2011
DOI:10.1039/C1CC15508C
Dihydronaphthyl-based [60]fullerene bisadduct derivative, NC60BA, was synthesized at mild temperature in high yield. NC60BA not only possesses a LUMO energy level 0.16 eV higher than PC61BM but also has amorphous nature that can overcome thermal-driven crystallization. The fabricated P3HT:NC60BA-based polymer solar cells exhibit superior photovoltaic performance and thermal stability compared to PC61BM-based devices under the same conditions.
Co-reporter:Taishan Wang, Jingyi Wu, Yongqiang Feng, Yihan Ma, Li Jiang, Chunying Shu and Chunru Wang
Dalton Transactions 2012 vol. 41(Issue 9) pp:2567-2570
Publication Date(Web):06 Jan 2012
DOI:10.1039/C2DT12162J
The bis-adducts of Sc3C2@C80 fulleropyrrolidines were prepared and isolated. ESR study showed that these bis-addition fulleropyrrolidines have varied paramagnetism resulting from diverse reaction sites for the second pyrrolidine addend.
Co-reporter:Xiulin Yang, Xueyun Wang, Guoqiang Zhang, Junpeng Zheng, Taishan Wang, Xianzong Liu, Chunying Shu, Li Jiang, Chunru Wang
International Journal of Hydrogen Energy 2012 Volume 37(Issue 15) pp:11167-11175
Publication Date(Web):August 2012
DOI:10.1016/j.ijhydene.2012.04.153
We report the preparation of well-dispersed Pt nanoparticles depositing on Mn3O4-modified multi-walled carbon nanotubes (Mn3O4-MWCNTs) that can be taken as high performance catalyst in methanol electro-oxidation. Various spectrometry techniques such as FT-IR, Raman, XRD, TEM and XPS measurements were performed, revealing that the Pt nanoparticles were highly dispersed on the surface of Mn3O4-modified MWCNTs with a narrow size distribution between 1.7 nm and 3.9 nm. Compared the Pt/MWCNT catalyst without Mn3O4 modification, the Pt/Mn3O4-MWCNT composite catalyst not only shows relative large electrochemical active surface area (EAS), high catalyzing activity toward methanol electro-oxidation, but also exhibits very high stability with apparent anti-poisoning tolerance to the incomplete oxidized species during methanol oxidation.Graphical AbstractHighlights► Mn3O4 was successfully modified on acid-treated MWCNTs in reducing solvents. ► Pt nanoparticles were uniformly deposited on the Mn3O4-MWCNT surface. ► The Mn3O4 in the catalyst played an important role in catalytic performance. ► The prepared catalyst presented better catalytic activity for methanol oxidation.
Co-reporter:Li-Hua Gan, Qing Chang, Li Xu, Xing-Liang Huang, Chun-Ying Shu, Chun-Ru Wang
Chemical Physics Letters 2012 Volume 532() pp:68-71
Publication Date(Web):12 April 2012
DOI:10.1016/j.cplett.2012.01.082
Abstract
Classical isomers of fullerenes usually obey the pentagon adjacent penalty rule. However, density functional theory calculations demonstrate that an isomer of fullerene C60 with 15 pentagon–pentagon fusions is lower in energy than any isomer of C60 with 14 pentagon–pentagon fusions and thus violates the established pentagon adjacent penalty rule. Further examination demonstrates that this isomer follows the spherical rule; however it is anti-aromatic with positive nucleus-independent chemical shifts at the cage center and most ring centers. The calculations show that hydrogenation and cluster encapsulation are both highly exothermic and demonstrate that this isomer may be captured in the form of its derivatives.
Co-reporter:Li Xu, Shu-Fei Li, Li-Hua Gan, Chun-Ying Shu, Chun-Ru Wang
Chemical Physics Letters 2012 Volume 521() pp:81-85
Publication Date(Web):10 January 2012
DOI:10.1016/j.cplett.2011.11.011
Abstract
DFT calculations demonstrated that the parent cage of both Lu3N@C88 and Gd3N@C88 is D2 symmetrical C88:81 738 and their structures and stability are mainly determined by electron transfer interaction between the encaged cluster and the parent cage. However, for La3N@C88, the parent cage is Cs symmetric C88:81 734, La3N cluster are pyramidal in most screened cages, and the structure and stability of La3N@C88 is determined by both electron transfer interaction and size effect. The calculations can rationalize the recent experimental observations and clearly demonstrate that the size of encaged cluster play a substantial role in determining the structures and stability of M3N@C88.
Co-reporter:Yihan Ma, Taishan Wang, Jingyi Wu, Yongqiang Feng, Wei Xu, Li Jiang, Junpeng Zheng, Chunying Shu and Chunru Wang
Nanoscale 2011 vol. 3(Issue 12) pp:4955-4957
Publication Date(Web):07 Nov 2011
DOI:10.1039/C1NR11327E
A new metallofullerene Y3N@C78-C2 was synthesized and characterized. It was shown that Y3N@C78 has an unconventional C78-C2 cage with two pairs of fused pentagons closely bonded with two yttrium atoms. DFT calculations showed that the size of the ionic radii of the metals forming the caged cluster plays an important role in the non-isolated-pentagon-rule-feature of the C78 cage.
Co-reporter:Hui Li, Wei Li, Yanjun Zhang, Taishan Wang, Bao Wang, Wei Xu, Li Jiang, Weiguo Song, Chunying Shu and Chunru Wang
Journal of Materials Chemistry A 2011 vol. 21(Issue 22) pp:7878-7881
Publication Date(Web):03 May 2011
DOI:10.1039/C1JM10979K
Chrysanthemum-like α-FeOOH was synthesized via an environment-friendly H2O/ethylene glycol (EG) cooperating-mediated method. Based on detailed characterizations of the as-obtained hierarchical α-FeOOH nanostructure, the assembly process and possible formation mechanism were clarified. The as-obtained α-FeOOH nanomaterial exhibits a high adsorption performance in water treatment.
Co-reporter:Wei Xu, Lai Feng, Yishi Wu, Taishan Wang, Jingyi Wu, Junfeng Xiang, Bao Li, Li Jiang, Chunying Shu and Chunru Wang
Physical Chemistry Chemical Physics 2011 vol. 13(Issue 2) pp:428-433
Publication Date(Web):19 Nov 2010
DOI:10.1039/C0CP01076F
A series of novel supramolecular complexes composed of a three-point binding C60-trispyridylporphyrin dyad (1) or C70-trispyridylporphyrin dyad (2) and zinc tetraphenylporphyrin (ZnP) were constructed by adopting a “covalent–coordinate” bonding approach, composed of three-point binding. The dyads and self-assembled supramolecular triads or pentads formed by coordinating the pyridine groups located on the dyads to ZnP, have been characterized by means of spectral and electrochemical techniques. The formation constants of ZnP-1 and ZnP-2 complexes were calculated as 1.4 × 104 M−1 and 2.0 × 104 M−1, respectively, and the Stern–Volmer quenching constants KSV were founded to be 2.9 × 104 M−1 and 5.5 × 104 M−1, respectively, which are much higher than those of other supramolecular complexes such as previously reported ZnP-3 (N-ethyl-2-(4-pyridyl)-3,4-fulleropyrrolidine). The electrochemical investigations of these complexes suggest weak interactions between the constituents in the ground state. The excited states of the complexes were further monitored by time-resolved fluorescence measurements. The results revealed that the presence of the multiple binding point dyads (1 or 2) slightly accelerated the fluorescence decay of ZnP in o-DCB relative to that of the “single-point” bound supramolecular complex ZnP-3. In comparison with 1 and 2, C70 is suggested as a better electron acceptor relative to C60. DFT calculations on a model of supramolecular complex ZnP-1 (with one ZnP entity) were performed. The results revealed that the lowest unoccupied molecular orbital (LUMO) is mainly located on the fullerene cage, while the highest occupied molecular orbital (HOMO) is mainly located on the ZnP macrocycle ring, predicting the formation of radical ion pair ZnP+˙-H2P-C60−˙ during photo-induced reaction.
Co-reporter:Wei Xu ; Tai-Shan Wang ; Jing-Yi Wu ; Yi-Han Ma ; Jun-Peng Zheng ; Hui Li ; Bao Wang ; Li Jiang ; Chun-Ying Shu
The Journal of Physical Chemistry C 2011 Volume 115(Issue 2) pp:402-405
Publication Date(Web):December 14, 2010
DOI:10.1021/jp1087459
We report the preparation, isolation, and spectroscopic characterizations of a novel endofullerene Lu3C2@C88, where a planar trimetallic carbide cluster Lu3C2 is encapsulated by D2-symmetric C88 cage. Meanwhile, the trimetallic nitride endofullerene Lu3N@C88 was also isolated and characterized for comparison. The results revealed that both metal carbide Lu3C2 and metal nitride Lu3N share the same D2-symmetric C88 cage. Theoretical studies revealed that the internal moieties supply the C88 cage with six electrons in both Lu3N@C88 and Lu3C2@C88 cases; however, Lu3N@C88 has a closed-shell electronic structure and Lu3C2@C88 owns an unpaired electron localized on the internal [Lu3C2]6+ moiety. The different molecular electronic structures of Lu3C2@C88 and Lu3N@C88 lead to distinct differences on both the UV−vis absorption spectral features and their electrochemical redox properties.
Co-reporter:Jingyi Wu ; Taishan Wang ; Yihan Ma ; Li Jiang ; Chunying Shu ;Chunru Wang
The Journal of Physical Chemistry C 2011 Volume 115(Issue 48) pp:23755-23759
Publication Date(Web):October 26, 2011
DOI:10.1021/jp2081929
Following the first isolation of Sc3NC@C80, a second member of this family of endohedral metallofullerenes, Sc3NC@C78, was prepared by an arc-discharging method. Experimental and theoretical studies demonstrated that the Sc3NC@C78 has a C78-C2 cage with two pairs of adjacent pentagons, which is different from the IPR-satisfying Sc3N@C78-D3h. It was revealed that the size of C78-D3h is appropriate for the Sc3N cluster, but not large enough for encaging the large planar species Sc3NC. Theoretical calculations were preformed on Sc3NC@C78-C2 and Sc3NC@C78-D3h. The results show that Sc3NC would bear a strong depression inside the C78-D3h fullerene cage due to the limited internal space of C78-D3h; on the contrary, C78-C2 has two pairs of adjacent pentagons that induce a large curvature in these sites to form an oblate ellipsoid structure. Thus, it is more favorable to encapsulate the planar species Sc3NC. Ab initio calculations were also performed to further disclose the electronic and electrochemical properties of Sc3NC@C78-C2. It was revealed that the molecule has an electronic structure of (Sc3+)3(NC)3–@C786–, in which the inner species NC has an unprecedented (NC)3– trianion charging status similar to that in the recently reported Sc3NC@C80-Ih.
Co-reporter:Tai-Shan Wang ; Lai Feng ; Jing-Yi Wu ; Wei Xu ; Jun-Feng Xiang ; Kai Tan ; Yi-Han Ma ; Jun-Peng Zheng ; Li Jiang ; Xin Lu ; Chun-Ying Shu
Journal of the American Chemical Society 2010 Volume 132(Issue 46) pp:16362-16364
Publication Date(Web):November 3, 2010
DOI:10.1021/ja107843b
The endohedral fullerene Sc3NC@C80-Ih has been synthesized and characterized; it has an unprecedented planar quinary cluster in a fullerene cage. It is also the first chemical compound in which the presence of an unprecedented (NC)3− trianion has been disclosed. The fascinating intramolecular dynamics in Sc3NC@C80-Ih enables the whole molecule to display high polarity and promising ferroelectricity. This finding inspires the possibility that such a planar quinary cluster may be useful in constructing many other endohedral fullerenes.
Co-reporter:Bao Wang, Xing-Long Wu, Chun-Ying Shu, Yu-Guo Guo and Chun-Ru Wang
Journal of Materials Chemistry A 2010 vol. 20(Issue 47) pp:10661-10664
Publication Date(Web):11 Oct 2010
DOI:10.1039/C0JM01941K
An optimized nanostructure design for electrode materials for high-performance lithium-ion batteries was realized by introducing three-dimensional (3D) graphene networks into transition metal oxide nanomicrostructures. A CuO/graphene composite was selected as a typical example of the optimized design. Self-assembled CuO and CuO/graphene urchin-like structures have been successfully synthesized by a simple solution method and investigated with SEM, TEM, XRD, and electrochemical measurements. The CuO/graphene nanocomposite exhibits a remarkably enhanced cycling performance and rate performance compared with pure CuO urchin-like structure when being used as anode materials in lithium-ion batteries. During all the 100 discharge-charge cycles under a current density of 65 mA g−1, the CuO/graphene electrode can stably deliver a reversible capacity of ca. 600 mA h g−1. At a high current density of 6400 mA g−1, the specific charge capacity of the CuO/graphene nanocomposite is still as high as 150 mA h g−1, which is three times larger than that of graphene (48 mA h g−1), while that of CuO is nearly null under the same current density. The enhancement of the electrochemical performance could be attributed to the 3D electrically conductive networks of graphene as well as the unique nanomicrostructure of the CuO/graphene nanocomposite in which the CuO nanomicroflowers are enwrapped by a thin layer of graphene as an elastic buffer.
Co-reporter:Yanjun Zhang, Jianjun Wang, Hongfei Zhu, Hui Li, Li Jiang, Chunying Shu, Wenping Hu and Chunru Wang
Journal of Materials Chemistry A 2010 vol. 20(Issue 44) pp:9858-9860
Publication Date(Web):18 Oct 2010
DOI:10.1039/C0JM02872J
Zn2SnO4 (ZTO) nanowires were prepared by thermal evaporation method and ultraviolet photodetectors based on an individual ZTO nanowire were investigated. The devices exhibited high performance such as high “ON/OFF” current ratio, high response speed and excellent device stability.
Co-reporter:Bao Wang, Chun-Ying Shu and Chun-Ru Wang
Journal of Materials Chemistry A 2010 vol. 20(Issue 34) pp:7104-7106
Publication Date(Web):02 Aug 2010
DOI:10.1039/C0JM01912G
Multi-walled carbon nanotubes (MWCNTs) were synthesized on uniform new-diamond film by decomposing methane at 900 °C with chemical vapor deposition technique. Based on various spectroscopic characterizations, such as scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy, a reasonable growth mechanism of MWCNTs was proposed. The metal-free prepared MWCNTs are easy to be purified and will have broad applications in material sciences.
Co-reporter:Bao Li Dr.;Chunying Shu Dr.;Xin Lu Dr.;Lothar Dunsch Dr.;Zhongfang Chen Dr.;T.JohnS. Dennis Dr.;Zhiqiang Shi Dr.;Li Jiang Dr.;Taishan Wang Dr.;Wei Xu Dr.;Chunru Wang Dr.
Angewandte Chemie International Edition 2010 Volume 49( Issue 5) pp:962-966
Publication Date(Web):
DOI:10.1002/anie.200905263
Co-reporter:Taishan Wang Dr.;Jingyi Wu Dr.;Wei Xu Dr.;Junfeng Xiang Dr.;Xin Lu Dr.;Bao Li Dr.;Li Jiang Dr.;Chunying Shu Dr.;Chunru Wang Dr.
Angewandte Chemie International Edition 2010 Volume 49( Issue 10) pp:1786-1789
Publication Date(Web):
DOI:10.1002/anie.200906325
Co-reporter:Tai-Shan Wang ; Ning Chen ; Jun-Feng Xiang ; Bao Li ; Jing-Yi Wu ; Wei Xu ; Li Jiang ; Kai Tan ; Chun-Ying Shu ; Xin Lu
Journal of the American Chemical Society 2009 Volume 131(Issue 46) pp:16646-16647
Publication Date(Web):October 30, 2009
DOI:10.1021/ja9077842
For the first time, we have produced the stable compound Sc4C2@C80-Ih and characterized it as a metal carbide endofullerene by FTIR and Raman spectroscopies in combination with DFT calculations. Furthermore, DFT calculations have demonstrated that this molecule has a Russian-doll-type structure, C2@Sc4@C80.
Co-reporter:Ru-Fang Peng, Shi-Jin Chu, Yi-Min Huang, Hai-Jun Yu, Tai-Shan Wang, Bo Jin, Yi-Bei Fu and Chun-Ru Wang
Journal of Materials Chemistry A 2009 vol. 19(Issue 22) pp:3602-3605
Publication Date(Web):06 May 2009
DOI:10.1039/B904234B
We developed an explosion-based method for preparing non-metal endohedral fullerenes. Fullerenes, an explosive and a noble gas are contained in an enclosed space. A flying plate within the apparatus is used to convert the explosion energy into kinetic energy of the gas molecules, which in turn bombard the fullerenes. Through adjusting the quantity of explosive, the gas molecules obtain sufficient energy to penetrate the fullerene surface and then become incarcerated forming endohedral fullerenes. Our technique was successfully applied to the production of He@C60 and He2@C60. However, it may be extendable to other endohedral fullerenes by employing other fullerenes, other inert gases (such as Ne, Ar, Kr, Xe), and an appropriate quantity of explosive.
Co-reporter:Chunying Shu, Wei Xu, Carla Slebodnick, Hunter Champion, Wujun Fu, Jonathan E. Reid, Hugo Azurmendi, Chunru Wang, Kim Harich, Harry C. Dorn and Harry W. Gibson
Organic Letters 2009 Volume 11(Issue 8) pp:1753-1756
Publication Date(Web):March 23, 2009
DOI:10.1021/ol9002527
Two new 6,6-open phenyl-C81-butyric acid methyl ester metallofulleroids, M3N@C80PCBM (M = Sc, Y), were synthesized by diazoalkane addition reactions and fully characterized. The results demonstrate that the reactive sites are the same for M3N@C80 (M = Sc, Y) but dramatically different from that of C60.
Co-reporter:Er-Yun Zhang, Chun-Ru Wang
Current Opinion in Colloid & Interface Science 2009 Volume 14(Issue 2) pp:148-156
Publication Date(Web):April 2009
DOI:10.1016/j.cocis.2007.10.002
This review presents a summary of the recent research progresses on fullerene self-assembly and supramolecular nanostructures. Fullerene nanospheres, one-dimensional nanowires/nanotubes, and two-dimensional layers were studied with various microscopic techniques such as the scanning tunneling microscopy, scanning electronic microscopy, and the transmission electron microscopy etc. It was revealed that the fullerene self-assembling structures were determined by both the fullerene intermolecular interactions and the fullerene–substrate interaction, therefore, different fullerene supramolecular nanostructures and morphologies could be obtained through controlling experimental conditions, e.g., the chemical modification of fullerenes by different chemical groups, the treatment of substrates, or the adopting of solvents etc.
Co-reporter:Chun-Ying Shu, Chun-Ru Wang, Jian-Fei Zhang, Harry W. Gibson, Harry C. Dorn, Frank D. Corwin, Panos P. Fatouros and T. John S. Dennis
Chemistry of Materials 2008 Volume 20(Issue 6) pp:2106
Publication Date(Web):February 21, 2008
DOI:10.1021/cm7023982
A new magnetic resonance imaging contrast agent containing organophosphonate functional groups was synthesized in high yield by a simple synthesis procedure. This molecule exhibits much higher longitudinal water proton relaxivity (37.0 mM−1 s−1) than commercial Omniscan (Gd-DTPA BMA, 5.7 mM−1 s−1) at 0.35 T. Notably, the relaxivity is larger than that of carboxylated Gd@C82 (16.0 mM−1 s−1) under the same conditions, indicating that the functional groups have an important role on the image contrast enhancement. In addition, the introduction of phosphonate substituents may provide bone-targeting MRI contrast agents.
Co-reporter:Chun-Ying Shu, Xin-Yong Ma, Jian-Fei Zhang, Frank D. Corwin, Jae Hyun Sim, Er-Yun Zhang, Harry C. Dorn, Harry W. Gibson, Panos P. Fatouros, Chun-Ru Wang and Xiao-Hong Fang
Bioconjugate Chemistry 2008 Volume 19(Issue 3) pp:651
Publication Date(Web):February 7, 2008
DOI:10.1021/bc7002742
Water-soluble gadofullerides exhibited high efficiency as magnetic resonance imaging (MRI) contrast agents. In this paper, we report the conjugation of the newly synthesized gadofulleride, Gd@C82O6(OH)16(NHCH2CH2COOH)8, with the antibody of green fluorescence protein (anti-GFP), as a model for “tumor targeted” imaging agents based on endohedral metallofullerenes. In this model system, the activity of the anti-GFP conjugate can be conveniently detected by green fluorescence protein (GFP), leading to in vitro experiments more direct and facile than those of tumor antibodies. Objective-type total internal reflection fluorescence microscopy revealed that each gadofulleride aggregate conjugated on average five anti-GFPs, and the activity of anti-GFPs was preserved after conjugation. In addition, the gadofulleride/antibody conjugate exhibited higher water proton relaxivity (12.0 mM−1 s−1) than the parent gadofulleride aggregate (8.1 mM−1 s−1) in phosphate buffered saline at 0.35 T, as also confirmed by T1-weighted images of phantoms. These observations clearly indicate that the synthesized gadofulleride/antibody conjugate not only has targeting potential, but also exhibits higher efficiency as an MRI contrast agent.
Co-reporter:Fei Tian ; Wei Liu
The Journal of Physical Chemistry C 2008 Volume 112(Issue 24) pp:8763-8766
Publication Date(Web):May 22, 2008
DOI:10.1021/jp8025754
We report a facile method to synthesize single crystalline copper 7,7,8,8- tetracyanoquinodimethane (CuTCNQ) nanostructures using the chemical vapor deposition (CVD) method. It was revealed that, through simply adjusting the temperature-rising rate in CVD process, the CuTCNQ nanostructures were controllable in both the size and morphology. The single crystal of the CuTCNQ nanostructures was characterized by SEM, TEM, XRD, XPS, IR, etc. The field emission property of the CuTCNQ was studied and the result revealed that field emission property of CuTCNQ depends on its morphology.
Co-reporter:Dong-Wei Yan, Jun Zhong, Chun-Ru Wang, Zi-Yu Wu
Spectrochimica Acta Part B: Atomic Spectroscopy 2007 Volume 62(6–7) pp:711-716
Publication Date(Web):July 2007
DOI:10.1016/j.sab.2007.02.019
Single-walled carbon nanotubes were produced by the conventional arc discharge method, and purified with a two-step treatment. First, the raw soot containing single-walled carbon nanotubes was burned up at ca. 350 °C in air to remove amorphous carbon, and then it was treated by strong acidic solvents to remove metal catalysts. Near-edge X-ray absorption fine structure spectroscopy was applied to analyze the defects on single-walled carbon nanotubes in whole purification process, so the experimental conditions can be optimized, and finally high-purity single-walled carbon nanotubes were obtained as revealed by various spectroscopic characterizations such as scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, and Raman spectroscopy.
Co-reporter:Chun-Ying Shu, Li-Hua Gan, Chun-Ru Wang, Xin-long Pei, Hong-bin Han
Carbon 2006 Volume 44(Issue 3) pp:496-500
Publication Date(Web):March 2006
DOI:10.1016/j.carbon.2005.08.016
Water-soluble amino acid derivatives of gadolinium (Gd) endohedral metallofullerenes (AAD-EMFs), Gd@C82Om(OH)n(NHCH2CH2COOH)l (m ≈ 6, n ≈ 16 and l ≈ 8) are synthesized by a direct reaction of the pure endohedral metallofullerene Gd@C82 with an excess of alkaline solution of β-alanine. The structure of the AAD-EMFs is characterized by FTIR, XPS and laser-desorption time-of-flight (LD-TOF) mass spectrometries. Water proton relaxivity analysis indicates that the longitudinal relaxivity R1 (the effect on 1/T1, 9.1 mM−1 s−1) of AAD-EMFs is higher than that of the commercial MRI contrast agent, Magnevist (gadolinium-diethylenetriaminepentaacetic acid, Gd-DTPA, 5.6 mM−1 s−1). The MRI phantom studies are performed to confirm the high efficiency of this sample as MRI contrast agents.
Co-reporter:Zhi-Qiang Shi Dr.;Xin Wu Dr.;Xin Lu Dr.;Hisanori Shinohara Dr.
Angewandte Chemie 2006 Volume 118(Issue 13) pp:
Publication Date(Web):24 FEB 2006
DOI:10.1002/ange.200503705
Regelwidrig: Das Metallcarbid-Endofulleren Sc2C2@C68 wurde isoliert und charakterisiert (siehe Bild). Sein Valenzzustand ist mit (Sc3+)2(C2)2−@C684− zu beschreiben, und sein Kohlenstoffkäfig entspricht nicht der Regel der isolierten Fünfecke (IPR-Regel). Mit endohedralen Clustern als Templaten entstehen demnach unterschiedliche Nicht-IPR-C68-Käfige (Sc3N@C68 ist ein weiteres Beispiel).
Co-reporter:Zhi-Qiang Shi, Xin Wu, Chun-Ru Wang, Xin Lu,Hisanori Shinohara
Angewandte Chemie International Edition 2006 45(13) pp:2107-2111
Publication Date(Web):
DOI:10.1002/anie.200503705
Co-reporter:C.-J. Li;Y.-G. Guo;B.-S. Li;C.-R. Wang;L.-J. Wan;C.-L. Bai
Advanced Materials 2005 Volume 17(Issue 1) pp:
Publication Date(Web):13 JAN 2005
DOI:10.1002/adma.200400155
Metallofullerene-based nanowire and nanotube arrays are fabricated for the first time using a technique that allows the diameter, length, and morphology of the non-crystalline Sc@C82 nanostructures to be controlled by adjusting the experimental conditions. The Figure shows the geometrical structure of Sc@C82.
Co-reporter:Yongqiang Feng, Taishan Wang, Jingyi Wu, Zhuxia Zhang, Li Jiang, Hongbin Han and Chunru Wang
Chemical Communications 2014 - vol. 50(Issue 81) pp:NaN12168-12168
Publication Date(Web):2014/08/25
DOI:10.1039/C4CC05783J
A hydrogen-containing endohedral metallofullerene, Sc4C2H@Ih-C80, was synthesized and its paramagnetism was measured by the low-temperature EPR spectrometry with a broad EPR signal. The electron-spin excitation by implanting the H-atom would be a new method for preparation of stable paramagnetic metallofullerenes.
Co-reporter:Yongqiang Feng, Taishan Wang, Jingyi Wu, Yihan Ma, Zhuxia Zhang, Li Jiang, Chunhua Ge, Chunying Shu and Chunru Wang
Chemical Communications 2013 - vol. 49(Issue 21) pp:NaN2150-2150
Publication Date(Web):2013/01/30
DOI:10.1039/C3CC38445D
A paramagnetic Sc3NC@C80 anion radical was obtained by chemical reduction. ESR spectrometry and theoretical calculations disclosed that the core NC moiety takes possession of the unpaired electron and stabilizes the paramagnetic species. It is the first time a paramagnetic metal cyanide metallofullerene has been obtained.
Co-reporter:Jie Li, Taishan Wang, Yongqiang Feng, Ying Zhang, Mingming Zhen, Chunying Shu, Li Jiang, Yuqing Wang and Chunru Wang
Dalton Transactions 2016 - vol. 45(Issue 21) pp:NaN8699-8699
Publication Date(Web):2016/03/30
DOI:10.1039/C6DT00223D
A new water-soluble gadolinium metallofullerenol was prepared through a solid–liquid reaction. It was characterized to have an enhanced effective magnetic moment, and improved T1-weighted relaxivity and magnetic resonance imaging performance in the liver. This material prepared by a facile method has wide application as a contrast agent and biological medicine.
Co-reporter:Xueyun Wang, Jianhua Cai, Yanjun Zhang, Lihua Li, Li Jiang and Chunru Wang
Journal of Materials Chemistry A 2015 - vol. 3(Issue 22) pp:NaN11800-11800
Publication Date(Web):2015/04/15
DOI:10.1039/C5TA02034D
The effects of the chemical composition on the properties, such as morphology, surface area, crystallinity and crystal structure, of magnesium titanate nanorods have been investigated. The adsorption performance of the magnesium titanate nanorods with changed chemical compositions presented a significant difference. The amorphous sample Ti/Mg-1/5-500 with the highest surface area of 152 m2 g−1 possessed the highest Pb2+ adsorption capacity of 241 mg g−1.
Co-reporter:Xiulin Yang, Mingming Zhen, Gen Li, Xianzong Liu, Xueyun Wang, Chunying Shu, Li Jiang and Chunru Wang
Journal of Materials Chemistry A 2013 - vol. 1(Issue 28) pp:NaN8110-8110
Publication Date(Web):2013/06/10
DOI:10.1039/C3TA11907F
Pd-modified fullerenol (Pd-F) composite nanoparticles (NPs) are obtained through an in situ reduction method. These Pd-F composite NPs loaded on CNTs exhibit competitive electrocatalytic activity and outstanding stability for methanol oxidation in alkaline solution, which indicate that the fullerenols in the composite catalyst play an important role in the catalytic process.
Co-reporter:Wei Xu, Lai Feng, Yishi Wu, Taishan Wang, Jingyi Wu, Junfeng Xiang, Bao Li, Li Jiang, Chunying Shu and Chunru Wang
Physical Chemistry Chemical Physics 2011 - vol. 13(Issue 2) pp:NaN433-433
Publication Date(Web):2010/11/19
DOI:10.1039/C0CP01076F
A series of novel supramolecular complexes composed of a three-point binding C60-trispyridylporphyrin dyad (1) or C70-trispyridylporphyrin dyad (2) and zinc tetraphenylporphyrin (ZnP) were constructed by adopting a “covalent–coordinate” bonding approach, composed of three-point binding. The dyads and self-assembled supramolecular triads or pentads formed by coordinating the pyridine groups located on the dyads to ZnP, have been characterized by means of spectral and electrochemical techniques. The formation constants of ZnP-1 and ZnP-2 complexes were calculated as 1.4 × 104 M−1 and 2.0 × 104 M−1, respectively, and the Stern–Volmer quenching constants KSV were founded to be 2.9 × 104 M−1 and 5.5 × 104 M−1, respectively, which are much higher than those of other supramolecular complexes such as previously reported ZnP-3 (N-ethyl-2-(4-pyridyl)-3,4-fulleropyrrolidine). The electrochemical investigations of these complexes suggest weak interactions between the constituents in the ground state. The excited states of the complexes were further monitored by time-resolved fluorescence measurements. The results revealed that the presence of the multiple binding point dyads (1 or 2) slightly accelerated the fluorescence decay of ZnP in o-DCB relative to that of the “single-point” bound supramolecular complex ZnP-3. In comparison with 1 and 2, C70 is suggested as a better electron acceptor relative to C60. DFT calculations on a model of supramolecular complex ZnP-1 (with one ZnP entity) were performed. The results revealed that the lowest unoccupied molecular orbital (LUMO) is mainly located on the fullerene cage, while the highest occupied molecular orbital (HOMO) is mainly located on the ZnP macrocycle ring, predicting the formation of radical ion pair ZnP+˙-H2P-C60−˙ during photo-induced reaction.
Co-reporter:Yanjun Zhang, Li Jiang and Chunru Wang
Physical Chemistry Chemical Physics 2015 - vol. 17(Issue 31) pp:NaN20065-20065
Publication Date(Web):2015/07/08
DOI:10.1039/C5CP03305E
A SnO2/graphene nanocomposite was prepared via a facile solvothermal process using stannous octoate as a Sn source. The as-prepared SnO2/graphene nanocomposite exhibited excellent electrochemical behavior with a high reversible capacity, a long cycle life and a good rate capability when used as an anode material for lithium-ion batteries.
Co-reporter:Ru-Fang Peng, Shi-Jin Chu, Yi-Min Huang, Hai-Jun Yu, Tai-Shan Wang, Bo Jin, Yi-Bei Fu and Chun-Ru Wang
Journal of Materials Chemistry A 2009 - vol. 19(Issue 22) pp:NaN3605-3605
Publication Date(Web):2009/05/06
DOI:10.1039/B904234B
We developed an explosion-based method for preparing non-metal endohedral fullerenes. Fullerenes, an explosive and a noble gas are contained in an enclosed space. A flying plate within the apparatus is used to convert the explosion energy into kinetic energy of the gas molecules, which in turn bombard the fullerenes. Through adjusting the quantity of explosive, the gas molecules obtain sufficient energy to penetrate the fullerene surface and then become incarcerated forming endohedral fullerenes. Our technique was successfully applied to the production of He@C60 and He2@C60. However, it may be extendable to other endohedral fullerenes by employing other fullerenes, other inert gases (such as Ne, Ar, Kr, Xe), and an appropriate quantity of explosive.
Co-reporter:Yanjun Zhang, Jianjun Wang, Hongfei Zhu, Hui Li, Li Jiang, Chunying Shu, Wenping Hu and Chunru Wang
Journal of Materials Chemistry A 2010 - vol. 20(Issue 44) pp:NaN9860-9860
Publication Date(Web):2010/10/18
DOI:10.1039/C0JM02872J
Zn2SnO4 (ZTO) nanowires were prepared by thermal evaporation method and ultraviolet photodetectors based on an individual ZTO nanowire were investigated. The devices exhibited high performance such as high “ON/OFF” current ratio, high response speed and excellent device stability.
Co-reporter:Bao Wang, Chun-Ying Shu and Chun-Ru Wang
Journal of Materials Chemistry A 2010 - vol. 20(Issue 34) pp:NaN7106-7106
Publication Date(Web):2010/08/02
DOI:10.1039/C0JM01912G
Multi-walled carbon nanotubes (MWCNTs) were synthesized on uniform new-diamond film by decomposing methane at 900 °C with chemical vapor deposition technique. Based on various spectroscopic characterizations, such as scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy, a reasonable growth mechanism of MWCNTs was proposed. The metal-free prepared MWCNTs are easy to be purified and will have broad applications in material sciences.
Co-reporter:Bao Wang, Xing-Long Wu, Chun-Ying Shu, Yu-Guo Guo and Chun-Ru Wang
Journal of Materials Chemistry A 2010 - vol. 20(Issue 47) pp:NaN10664-10664
Publication Date(Web):2010/10/11
DOI:10.1039/C0JM01941K
An optimized nanostructure design for electrode materials for high-performance lithium-ion batteries was realized by introducing three-dimensional (3D) graphene networks into transition metal oxide nanomicrostructures. A CuO/graphene composite was selected as a typical example of the optimized design. Self-assembled CuO and CuO/graphene urchin-like structures have been successfully synthesized by a simple solution method and investigated with SEM, TEM, XRD, and electrochemical measurements. The CuO/graphene nanocomposite exhibits a remarkably enhanced cycling performance and rate performance compared with pure CuO urchin-like structure when being used as anode materials in lithium-ion batteries. During all the 100 discharge-charge cycles under a current density of 65 mA g−1, the CuO/graphene electrode can stably deliver a reversible capacity of ca. 600 mA h g−1. At a high current density of 6400 mA g−1, the specific charge capacity of the CuO/graphene nanocomposite is still as high as 150 mA h g−1, which is three times larger than that of graphene (48 mA h g−1), while that of CuO is nearly null under the same current density. The enhancement of the electrochemical performance could be attributed to the 3D electrically conductive networks of graphene as well as the unique nanomicrostructure of the CuO/graphene nanocomposite in which the CuO nanomicroflowers are enwrapped by a thin layer of graphene as an elastic buffer.
Co-reporter:Hui Li, Wei Li, Yanjun Zhang, Taishan Wang, Bao Wang, Wei Xu, Li Jiang, Weiguo Song, Chunying Shu and Chunru Wang
Journal of Materials Chemistry A 2011 - vol. 21(Issue 22) pp:NaN7881-7881
Publication Date(Web):2011/05/03
DOI:10.1039/C1JM10979K
Chrysanthemum-like α-FeOOH was synthesized via an environment-friendly H2O/ethylene glycol (EG) cooperating-mediated method. Based on detailed characterizations of the as-obtained hierarchical α-FeOOH nanostructure, the assembly process and possible formation mechanism were clarified. The as-obtained α-FeOOH nanomaterial exhibits a high adsorption performance in water treatment.
Co-reporter:Xiulin Yang, Xueyun Wang, Xianzong Liu, Yanjun Zhang, Weiguo Song, Chunying Shu, Li Jiang and Chunru Wang
Journal of Materials Chemistry A 2013 - vol. 1(Issue 29) pp:NaN8337-8337
Publication Date(Web):2013/06/13
DOI:10.1039/C3TA11965C
Novel graphene-like Fe2O3 nanofilms were successfully synthesized by a conventional hydrothermal method. The resulting composite showed ultrafast adsorption rates and high adsorption capacities for removal of Pb(II) and MB. Meanwhile, this material also revealed excellent photocatalytic properties.
Co-reporter:Xiulin Yang, Xueyun Wang, Yongqiang Feng, Guoqiang Zhang, Taishan Wang, Weiguo Song, Chunying Shu, Li Jiang and Chunru Wang
Journal of Materials Chemistry A 2013 - vol. 1(Issue 3) pp:NaN477-477
Publication Date(Web):2012/11/06
DOI:10.1039/C2TA00594H
A kind of hierarchical porous magnetic Fe2O3@AlO(OH) superstructure nanomaterial was prepared by a facile method involving ethylene glycol as both cross linker and stabilizing agent. The resulting hierarchical material shows ultrafast adsorption rates and high adsorption capacities for removal of Pb(II), As(V) and Cr(VI) ions from aqueous solution.
Co-reporter:Li-Hua Gan, Dingrong Deng, Yanjun Zhang, Gen Li, Xueyun Wang, Li Jiang and Chun-Ru Wang
Journal of Materials Chemistry A 2014 - vol. 2(Issue 8) pp:NaN2466-2466
Publication Date(Web):2013/12/16
DOI:10.1039/C3TA14242F
Novel Zn3V2O8 hexagon nanosheets were synthesized by a simple hydrothermal method and characterized by various spectroscopic techniques. The Zn3V2O8 nanosheets were revealed to show a high performance as an anode material for lithium-ion batteries with good rate capacity, high cycling stability, and excellent discharge capacity up to 1103 mA h g−1 at a 200 mA g−1 current density.
Co-reporter:Fuwen Zhao, Xiangyue Meng, Yongqiang Feng, Zhiwen Jin, Qing Zhou, Hui Li, Li Jiang, Jizheng Wang, Yongfang Li and Chunru Wang
Journal of Materials Chemistry A 2015 - vol. 3(Issue 29) pp:NaN14995-14995
Publication Date(Web):2015/06/10
DOI:10.1039/C5TA04040J
Six fractions of indene-C60 bisadducts (IC60BAs) with two indene pendants located at different positions of the C60 cage were isolated by using the HPLC technique, in which one enantiomeric mixture was purified and the structure was confirmed by single crystal XRD analysis. It was revealed that the isolated IC60BA isomers possess an elevated LUMO energy level and afford increased electron mobility, but the solar cells assembled by the isolated IC60BA isomers with P3HT did not show high performance due to a serious phase separation between them. The results suggest that for high performance polymer solar cells we should consider not only the energy level matching between the donor and acceptor materials, but also the structural matching between them.
Co-reporter:Taishan Wang, Jingyi Wu, Yongqiang Feng, Yihan Ma, Li Jiang, Chunying Shu and Chunru Wang
Dalton Transactions 2012 - vol. 41(Issue 9) pp:NaN2570-2570
Publication Date(Web):2012/01/06
DOI:10.1039/C2DT12162J
The bis-adducts of Sc3C2@C80 fulleropyrrolidines were prepared and isolated. ESR study showed that these bis-addition fulleropyrrolidines have varied paramagnetism resulting from diverse reaction sites for the second pyrrolidine addend.
Co-reporter:Toujun Zou, Mingming Zhen, Daiqin Chen, Ruimin Li, Mirong Guan, Chunying Shu, Hongbin Han and Chunru Wang
Dalton Transactions 2015 - vol. 44(Issue 19) pp:NaN9119-9119
Publication Date(Web):2015/04/07
DOI:10.1039/C4DT03482A
Manganese-porphyrin compounds as MRI contrast agents have drawn particular attention due to high relaxivities and unique biodistribution. It has been reported that the charge density of the metal center and steric decompression of the substituents, rather than rotational correlation time, were the key factors to determine the relaxivities of manganese(III) porphyrins. In this study, [6,6]-phenyl-C61-butyric acid (PC61BA) was introduced into 5-(4-aminophenyl)-10,15,20-tris (4-sulfonatophenyl) porphyrin (APTSPP) to investigate the influence on water proton relaxation. The obtained PC61BA-APTSPP-Mn possesses a relaxivity of 19.2 mM−1 s−1, which is greater than that of Mn-APTSPP (11.2 mM−1 s−1) and clinically used Gd-DTPA (4.1 mM−1 s−1) at 0.5 T, and even more effective compared with those binding manganese(III) porphyrins to certain macromolecules. It was reasonably speculated that the high relaxivity of PC61BA-APTSPP-Mn should ascribe to the charge density variation of MnIII and steric decompression induced by PC61BA. Both fluorescence emission spectra and cyclic voltammetry results verified the presence of electronic communication between PC61BA and APTSPP-Mn. In addition, the hydrodynamic diameter of PC61BA-APTSPP-Mn aggregates was much smaller than that of APTSPP-Mn aggregates, which may contribute to the higher relaxivity by inhibiting the formation of dimers of APTSPP-Mn. Therefore, the introduction of fullerene derivatives is suggested to be a good strategy for the improvement of the relaxivities of manganese(III) porphyrins.
Co-reporter:Yongqiang Feng, Taishan Wang, Junfeng Xiang, Lihua Gan, Bo Wu, Li Jiang and Chunru Wang
Dalton Transactions 2015 - vol. 44(Issue 5) pp:NaN2061-2061
Publication Date(Web):2014/12/17
DOI:10.1039/C4DT02892A
The internal clusters in metallofullerenes usually exhibit certain motion that is potentially usable in molecular gyroscopes and nano-machines. Based on 45Sc NMR, the motion of the scandium nitride cluster within the C80 cage was investigated via varying the temperature and modifying the cage, and by changing the cluster size.
Co-reporter:Yihan Ma, Taishan Wang, Jingyi Wu, Yongqiang Feng, Li Jiang, Chunying Shu and Chunru Wang
Chemical Communications 2012 - vol. 48(Issue 94) pp:NaN11572-11572
Publication Date(Web):2012/10/16
DOI:10.1039/C2CC36435B
Highly impressionable electron spin was found in endohedral azafullerene Y2@C79N at low temperature or upon exohedral chemical modification. These external stimulations can be employed to manipulate the spin-active Y2@C79N and can further be used in quantum processes for promising information-carrying spin systems and molecular devices.
Co-reporter:Xiangyue Meng, Wenqing Zhang, Zhan'ao Tan, Chun Du, Cuihong Li, Zhishan Bo, Yongfang Li, Xiulin Yang, Mingming Zhen, Feng Jiang, Junpeng Zheng, Taishan Wang, Li Jiang, Chunying Shu and Chunru Wang
Chemical Communications 2012 - vol. 48(Issue 3) pp:NaN427-427
Publication Date(Web):2011/11/10
DOI:10.1039/C1CC15508C
Dihydronaphthyl-based [60]fullerene bisadduct derivative, NC60BA, was synthesized at mild temperature in high yield. NC60BA not only possesses a LUMO energy level 0.16 eV higher than PC61BM but also has amorphous nature that can overcome thermal-driven crystallization. The fabricated P3HT:NC60BA-based polymer solar cells exhibit superior photovoltaic performance and thermal stability compared to PC61BM-based devices under the same conditions.
Co-reporter:Bo Wu, Taishan Wang, Zhuxia Zhang, Yongqiang Feng, Lihua Gan, Li Jiang and Chunru Wang
Chemical Communications 2013 - vol. 49(Issue 89) pp:NaN10491-10491
Publication Date(Web):2013/09/17
DOI:10.1039/C3CC46247A
Sc3N@C80 fulleropyrrolidines are typical metallofullerene derivatives which were generated by the reaction of Sc3N@C80 with N-trityloxazolidinone. Here we report an effective retro-reaction of Sc3N@C80 fulleropyrrolidine by using 3-chloroperoxybenzoic acid to give pristine Sc3N@C80 in a high yield. This technique is expected to be used for separating metallofullerenes (M3N@C80) from hollow fullerenes without HPLC.
Co-reporter:Jie Li, Fuwen Zhao, Taishan Wang, Mingzhe Nie, Jiangjun Li, Zhixiang Wei, Li Jiang and Chunru Wang
Journal of Materials Chemistry A 2017 - vol. 5(Issue 3) pp:NaN951-951
Publication Date(Web):2016/12/02
DOI:10.1039/C6TA09173C
Ethylenediamine (EDA) functionalized fullerene nanoparticles as independent electron transport layers (ETLs) for inverted polymer solar cells exhibited high electronic conductivity and low work function. Compared with ZnO, the power conversion efficiency of the devices based on PTB7-Th:PC71BM was increased from 9.1% to 10.06% with C60–EDA ETLs and to 9.49% with Gd@C82–EDA, mainly due to the greatly improved short current density.
Co-reporter:Yongjian Li, Taishan Wang, Chong Zhao, Yu Qin, Haibing Meng, Mingzhe Nie, Li Jiang and Chunru Wang
Dalton Transactions 2017 - vol. 46(Issue 28) pp:NaN8941-8941
Publication Date(Web):2017/06/13
DOI:10.1039/C7DT01761H
Endohedral lanthanide metallofullerene molecules exhibit various paramagnetic properties. In this study, we present a magnetoreception probe that can detect the magnetic properties of an endohedral metallofullerene via spin-paramagnet interaction between a nitroxide radical and Dy3N@C80. A cycloaddition reaction on the outer cage of Dy3N@C80 was employed to obtain two regioisomers linked with the nitroxide radical; the resultant adduct exhibits site-dependent signal intensity in the ESR spectra. This Dy3N@C80-nitroxide radical adduct has potential applications as a molecular compass with position-sensitive magnetoreception ability.
Co-reporter:Zhuxia Zhang, Taishan Wang, Bingshe Xu and Chunru Wang
Dalton Transactions 2014 - vol. 43(Issue 34) pp:NaN12875-12875
Publication Date(Web):2014/06/19
DOI:10.1039/C4DT01074D
A metallofullerene radical Y2@C81N was synthesized and characterized by ESR spectroscopy and ab initio calculations. It was revealed that the molecule adopts an unique azafullerene C81N cage derived from C82-C2v(9), and two yttrium ions are entrapped to form the endohedral structure. The unpaired electron of Y2@C81N radical was calculated to mainly localize on the Y2 dimer, leading to large hyperfine coupling constants of 75.7 and 69.8 G for the two yttrium nuclei.
![Manganese, [21H,23H-porphinato(2-)-κN21,κN22,κN23,κN24]-, (SP-4-1)-](/data/chemimg/2117900/15213-43-1.png)
![Manganese, [21H,23H-porphinato(2-)-κN21,κN22,κN23,κN24]-, (SP-4-1)-](/data/chemimg/2117900/15213-43-1_b.png)
![[60]PCBA](/data/chemimg/110100/161196-26-5.png)
![[60]PCBA](/data/chemimg/110100/161196-26-5_b.png)
![Ferrate(2-), [7,12-diethenyl-3,8,13,17-tetramethyl-21H,23H-porphine-2,18-dipropanoato(4-)-κN21,κN22,κN23,κN24]-, hydrogen (1:2), (SP-4-2)-](/data/chemimg/522800/14875-96-8.png)
![Ferrate(2-), [7,12-diethenyl-3,8,13,17-tetramethyl-21H,23H-porphine-2,18-dipropanoato(4-)-κN21,κN22,κN23,κN24]-, hydrogen (1:2), (SP-4-2)-](/data/chemimg/522800/14875-96-8_b.png)
![Benzenepentanoic acid, δ-[2-[(4-methylphenyl)sulfonyl]hydrazinylidene]-, methyl ester](/data/chemimg/137000/571170-23-5.png)
![Benzenepentanoic acid, δ-[2-[(4-methylphenyl)sulfonyl]hydrazinylidene]-, methyl ester](/data/chemimg/137000/571170-23-5_b.png)
![Gadolinate(1-),[1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetato(4-)-kN1,kN4,kN7,kN10,kO1,kO4,kO7,kO10]-, sodium (9CI)](http://img.cochemist.com/ccimg/93000/92923-44-9.png)
![Gadolinate(1-),[1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetato(4-)-kN1,kN4,kN7,kN10,kO1,kO4,kO7,kO10]-, sodium (9CI)](http://img.cochemist.com/ccimg/93000/92923-44-9_b.png)
![Zinc, [5,10,15,20-tetraphenyl-21H,23H-porphinato(2-)-κN21,κN22,κN23,κN24]-, (SP-4-1)-](/data/chemimg/478800/14074-80-7.png)
![Zinc, [5,10,15,20-tetraphenyl-21H,23H-porphinato(2-)-κN21,κN22,κN23,κN24]-, (SP-4-1)-](/data/chemimg/478800/14074-80-7_b.png)
