Co-reporter:Shao-Yun Yin, Si-Si Sun, Mei Pan, Yan-Zhong Fan, Yong-Xin Chen, Hai-Ping Wang, Ya-Nan Fan
Inorganic Chemistry Communications 2017 Volume 83(Volume 83) pp:
Publication Date(Web):1 September 2017
DOI:10.1016/j.inoche.2017.06.025
•Water soluble cyclometalated Ir(III) complexes were obtained by sulfonate-modified ligand.•Luminescence color tunability from cyan to red were obtained due to ligand modification.•Solid state luminescence is further affected by different aggregation states in the five complexes.Five cyclometalated Ir(III) complexes are synthesized from a sulfonate-modified bis-benzimidazole-type organic ligand (3,3′-(2,2′-(1,3-phenylene)bis(1H–benzo [d]imidazole-2,1-diyl))dipropane-1-sulfonic acid, MBS) with different ancillary ligands, and can be classified into two categories. Namely, complexes 1 and 2 (MBS-Ir-ppy and MBS-Ir-Fppy), which are electroneutral, and complexes 3–5 (MBS-Ir-bpy, MBS-Ir-Mebpy, and MBS-Ir-bpyCOOEt), which are cationic and soluble in water. These Ir(III) complexes show tunable luminescence from cyan to orangish red color in solution and yellowish red to pure red color in solid state, with moderately long lifetime (56–528 ns) and high quantum yield (35–71%).Download high-res image (189KB)Download full-size image
Co-reporter:Hui-Juan Yu, Zhi-Min Liu, Shao-Yun Yin, Kai Wu, Zhang-Wen Wei, Mei Pan
Inorganic Chemistry Communications 2017 Volume 86(Volume 86) pp:
Publication Date(Web):1 December 2017
DOI:10.1016/j.inoche.2017.10.020
•Metal-organic complexes with different dimensions were obtained by assembly of Cu(II) with two semirigid bipodal ligands.•Solid state crystallography and solution state ESI-MS studies manifest ring-opening isomerization mechanism.•Ua, Ub, or Z-type ligand conformations were found for the different coordination complexes.Reactions of Cu(NO3)2·3H2O or Cu(CF3SO3)2·6H2O with semirigid ligands 2,6-bis(pyridin-3-ylmethyl)-3a,4,4a,7a,8,8a-hexahydro-4,8-ethenopyrrolo[3,4-f]isoindole-1,3,5,7(2H,6H)-tetraone (L1) and 2,6-bis(pyridin-4-ylmethyl)-3a,4,4a,7a,8,8a-hexahydro-4,8-ethenopyrrolo[3,4-f]isoindole-1,3,5,7(2H,6H)-tetraone (L2) result in 0D tetragonal prismatic cage (1, 4), 1D loop-and-chain (2, 5, 6), and 2D (4,4) network (3) metal-organic complexes, which comprise of Ua, Ub or Z type ligand conformations, respectively. Solid state X-ray diffraction and solution state ESI-MS analyses manifest the ring-opening isomerization mechanism among the complexes, and photoluminescence properties are also studied.Download high-res image (147KB)Download full-size image
Co-reporter:Mei Pan, Cheng-Yong Su
Inorganic Chemistry Communications 2017 Volume 85(Volume 85) pp:
Publication Date(Web):1 November 2017
DOI:10.1016/j.inoche.2017.10.008
Co-reporter:Jing-Xiang Zhang;Cheng-Yong Su
Journal of Materials Chemistry B 2017 vol. 5(Issue 24) pp:4623-4632
Publication Date(Web):2017/06/22
DOI:10.1039/C7TB00702G
The combination of chemotherapy with photodynamic therapy can lead to improved therapeutic efficiencies and reduced side effects compared to conventional chemotherapy. Chlorambucil (CHL) is a DNA alkylating agent, but problems like drug instability, “off-target” binding and in situ monitoring after administration often limit its clinical application. In this regard, we designed a new heteroleptic Ru(II) complex CHL-RuL, bearing a CHL conjugated pendant, which is desired to serve as an image-guided chemo-photodynamic combined theranostic agent. CHL-RuL shows considerable promise as a photosensitizer for two-photon excitation photodynamic therapy: strong and wide UV-Vis absorption bands centered around 400 nm, strong red emission (∼702 nm) with a long lifetime at the microsecond level, moderate singlet oxygen quantum yield, and significant two-photon absorption cross-section (118 GM). More interestingly, this chemical modification affords CHL-RuL greater cellular uptake and remarkable mitochondria accumulation in HeLa cells. Furthermore, CHL-RuL shows a slight selective cytotoxicity toward carcinoma HeLa cells over normal MRC-5 cells. MTT assay results and two-photon scanning cell imaging demonstrate that CHL-RuL exhibits obvious chemo-photodynamic dual action against HeLa cells.
Co-reporter:Wei-Xu Feng;Shao-Yun Yin;Hai-Ping Wang;Ya-Nan Fan;Xing-Qiang Lü;Cheng-Yong Su
Journal of Materials Chemistry C 2017 vol. 5(Issue 7) pp:1742-1750
Publication Date(Web):2017/02/16
DOI:10.1039/C6TC04851J
By anchoring lanthanide coordination monomers onto a PMMA polymer backbone via a pre-designed vinylbenzyl-substituted NTB-type ligand, we succeeded in the fabrication of homo or hetero Ln-metallopolymers that can emit tunable and designable multicoloured photoluminescence as well as white light emission. Copolymerization results in the fine-tuning of the energy state of the ligand in the metallopolymer compared with that in the coordination monomer, thereby changing the energy transfer efficiency to Eu3+ and Tb3+ centers in opposite ways. And further designing of hetero-lanthanide metallopolymers leads to additional energy transfer between Eu3+ and Tb3+, facilitating the generation of pure white light emission. In general, the facile and controllable synthesis procedure, versatile and reproducible combination of lanthanides, ligands and polymer backbones, and relatively high white light emitting luminous efficiency (>5%) prove this method to be promising in future lighting WPLED applications.
Co-reporter:Lu-Yin Zhang;Shao-Yun Yin;Wei-Ming Liao;Jian-Hua Zhang;Hai-Ping Wang;Cheng-Yong Su
Journal of Materials Chemistry A 2017 vol. 5(Issue 20) pp:9807-9814
Publication Date(Web):2017/05/23
DOI:10.1039/C7TA00508C
Four butterfly-like binuclear Ru(II)–Ru(II) and Ir(III)–Ru(II) complexes were designed and synthesized via a stepwise method by Ru(II)/Ir(III) metalloligands containing polypyridine (bpy)/phenylpyridine (ppy), phenanthroline (phen) and bibenzimidazole (BiBzIm) moieties. The absorption and photoluminescence of Ru(II)–Ru(II) compounds are dominated by metal-to-ligand charge-transfer (MLCT) transitions from Ru(II) centers to the organic ligand parts, which emit in the deep red region with a wavelength ∼700 nm. While in Ir(III)–Ru(II) complexes, an additional decay channel is opened for the energy transfer from the higher energy level MLCT state of Ir(III)-coordinated units to the lower-energy level MLCT state of Ru(II)-coordinated units, as approved by both experimental and theoretical DFT calculations. Therefore, similar deep red emission profiles originating from Ru(II) units are observed in Ir(III)–Ru(II) systems. These binuclear complexes were further tested as photosensitizers (PSs) to produce H2 in photocatalytic water reduction systems. The highest H2 production efficiency can be obtained in the heteronuclear IrRu(1) system after 80 hours continuous production with a TON value of 1088 based on the amount of IrRu(1) as PS, much higher than the other binunclear complexes and mononuclear counterparts. The results provide a new insight into the designing guidelines for noble metal complexes as emitting centers and photosensitizers in lighting/display materials and devices, as well as photocatalytic water splitting systems.
Co-reporter:Ling Chen, Shao-Yun Yin, Mei Pan, Kai Wu, Hai-Ping Wang, Ya-Nan Fan and Cheng-Yong Su
Journal of Materials Chemistry A 2016 vol. 4(Issue 29) pp:6962-6966
Publication Date(Web):27 Jun 2016
DOI:10.1039/C6TC01308B
A highly fluorescent HPI-based excited-state intramolecular proton transfer (ESIPT) molecule is designed and adopted as a naked-eye colorimetric sensor to distinguish methanol, ethanol and isopropanol vapors. Amplified spontaneous emission was also observed for the C1-form single crystal of the molecule attributed to its intrinsic four-level energy states.
Co-reporter:Zhang-Wen Wei, Cheng-Xia Chen, Shao-Ping Zheng, Hai-Ping Wang, Ya-Nan Fan, Ye-Ye Ai, Mei Pan, and Cheng-Yong Su
Inorganic Chemistry 2016 Volume 55(Issue 15) pp:7311
Publication Date(Web):July 15, 2016
DOI:10.1021/acs.inorgchem.6b00429
We demonstrate that the conformation, packing mode, and blue fluorescence of a soft piezofluorochromic compound can be preserved by structurally fixing it into a solid calcium metal–organic framework (Ca-MOF, LIFM-40), which can survive pressures up to 8 MPa. DFT calculations have been combined with experimental results to indicate that the ligands adopting a specific conformation and packing without π···π interactions are the reasons for its rigidified blue emission.
Co-reporter:Lu-Yin Zhang, Kang Li, Mei Pan, Ya-Nan Fan, Hai-Ping Wang and Cheng-Yong Su
New Journal of Chemistry 2016 vol. 40(Issue 6) pp:5379-5386
Publication Date(Web):11 Apr 2016
DOI:10.1039/C6NJ00089D
Distinguishable d → f or f → d energy transfer processes depending on lanthanide ions are observed in isomorphous d–f heterometallic complexes containing the Ru(II) metalloligand (LRu), which lead to sensitized NIR emission (for Nd3+ and Yb3+) or enhanced red emission of LRu (for Eu3+ and Tb3+), and represent the first eye-detectable evidence of f → d energy transfer processes in Ln–Ru bimetallic complexes. Based on the systematic luminescence and decay lifetime study, cascade f → d → f energy transfer has been proposed in Ln1–Ru–Ln2 trimetallic systems for improved NIR sensitization.
Co-reporter:Wei-Ming Liao, Jian-Hua Zhang, Ya-Jun Hou, Hai-Ping Wang, Mei Pan
Inorganic Chemistry Communications 2016 Volume 73() pp:80-89
Publication Date(Web):November 2016
DOI:10.1016/j.inoche.2016.10.001
Photo-induced carbon dioxide conversion presents one of the basic reactions of natural photo-syntheses in green plants, which has inspired researchers to develop artificial materials and devices for efficient CO2 photo-reduction into useful products and chemical fuels via light-driven photochemical reactions. This review article focuses on recent advances in visible-light-driven CO2 photo-catalytic reduction studies based on Ru(II) and Ir(III) coordination complexes.
Co-reporter: Mei Pan;Bin-Bin Du;Yi-Xuan Zhu;Mei-Qin Yue;Dr. Zhang-Wen Wei; Cheng-Yong Su
Chemistry - A European Journal 2016 Volume 22( Issue 7) pp:2440-2451
Publication Date(Web):
DOI:10.1002/chem.201504344
Abstract
Two zwitterionic-type ligands featuring π–π* and intraligand charge-transfer (ILCT) excited states, namely 1,1′-(2,3,5,6-tetramethyl-1,4-phenylene)bis(methylene)dipyridinium-4-olate (TMPBPO) and 1-dodecylpyridin-4(1 H)-one (DOPO), have been prepared and applied to the assembly of lanthanide coordination complexes in an effort to understand the ligand-direction effect on the structure of the Ln complexes and the ligand sensitization effect on the luminescence of the Ln complexes. Due to the wide-band triplet states plus additional ILCT excitation states extending into lower energy levels, broadly and strongly sensitized photoluminescence of ff transitions from various Ln3+ ions were observed to cover the visible to near-infrared (NIR) regions. Among which, the Pr, Sm, Dy, and Tm complexes simultaneously display both strong visible and NIR emissions. Based on the isostructural feature of the Ln complexes, color tuning and single-component white light was achieved by preparation of solid solutions of the ternary systems Gd-Eu-Tb (for TMPBPO) and La-Eu-Tb and La-Dy-Sm (for DOPO). Moreover, the visible and NIR luminescence lifetimes of the Ln complexes with the TMPBPO ligand were investigated from 77 to 298 K, revealing a strong temperature dependence of the Tm3+ (3H4) and Yb3+ (2F5/2) decay dynamics, which has not been explored before for their coordination complexes.
Co-reporter:Bin-Bin Du, Yi-Xuan Zhu, Mei Pan, Mei-Qin Yue, Ya-Jun Hou, Kai Wu, Lu-Yin Zhang, Ling Chen, Shao-Yun Yin, Ya-Nan Fan and Cheng-Yong Su
Chemical Communications 2015 vol. 51(Issue 63) pp:12533-12536
Publication Date(Web):29 Jun 2015
DOI:10.1039/C5CC04468E
Direct white-light emission and further a dual-channel readable barcode module in both visible and NIR region was established by single-component homo-metallic Pr(III)-MOF crystals for the first time.
Co-reporter:Cheng Yan, Yan-Zhong Fan, Ling Chen, Mei Pan, Lu-Yin Zhang, Ji-Jun Jiang and Cheng-Yong Su
CrystEngComm 2015 vol. 17(Issue 3) pp:546-552
Publication Date(Web):17 Oct 2014
DOI:10.1039/C4CE01909A
In order to explore the supramolecular solid-state structural and packing transformations and the property tuning as a function of reaction time, a tripodal triBZ-ntb (4,4′,4′′-(2,2′,2′′-nitrilotris(methylene)tris(1H-benzo[d]imidazole-2,1-diyl)tris(methylene))tribenzonitrile) ligand was self-assembled with cadmium chloride by applying a hydrothermal method for differing reaction times. Three coordination structures were obtained, namely, [Cd(triBZ-ntb)Cl]2(CdCl4)·2H2O·2DMF (Cd5), [Cd(triBZ-ntb)Cl2]·3H2O (Cd10), and [Cd(triBZ-ntb)Cl]2(CdCl4)·2H2O (Cd20), and characterized by IR, EA, single crystal and powder X-ray diffraction methods. Cd5 and Cd20 have identical coordination monomers, [Cd(triBZ-ntb)Cl]+ and (CdCl4)2− counter anions, with a total metal-to-ligand ratio of 3:2, but with slightly different packing states. Meanwhile, the intermediate compound Cd10 is composed of only a neutral coordination unit [Cd(triBZ-ntb)Cl2], with a metal-to-ligand ratio of 1:1, by the additional coordination of one Cl− to the Cd(II) metal center. During the structural transformation process, the formation of (CdCl4)2− counter anions in Cd5 and Cd20 serves as an auxiliary “cabinet” for the storage of surplus Cd2+ metal ions. Theoretical study reveals the relative energy changes in the transformation processes. Furthermore, the switchable structures and packing states in these complexes result in tunable luminescent properties.
Co-reporter:Lu-Yin Zhang, Ya-Jun Hou, Mei Pan, Ling Chen, Yi-Xuan Zhu, Shao-Yun Yin, Guang Shao and Cheng-Yong Su
Dalton Transactions 2015 vol. 44(Issue 34) pp:15212-15219
Publication Date(Web):13 Apr 2015
DOI:10.1039/C5DT00545K
Four Ru(II)/Ir(III) metalloligands have been designed and synthesized from polypyridine and bibenzimidazole (BiBzIm) organic ligands, which show strong visible light absorption via metal-to-ligand charge transfer (MLCT) transitions. Nd/Yb(III) complexes were further assembled from these Ru(II)/Ir(III) metalloligands, and Ln(III)-centered NIR emissions can be efficiently sensitized by 3MLCT states of the metalloligands in the visible-light region. The energy transfer rates for the complexes are generally in the order Nd > Yb, which is due to the better matching between 3MLCT states of Ru(II)/Ir(III) metalloligands and densely distributed excited states of Nd(III) ions. Long decayed lifetimes on a μs scale and high quantum yields up to 1% are obtained in these lanthanide complexes, suggesting that the Ru(II)/Ir(III) metalloligands can serve as a good visible light harvesting antenna to efficiently sensitize Ln(III)-based NIR luminescence.
Co-reporter:Sheng-Run Zheng, Mei Pan, Kai Wu, Ling Chen, Ji-Jun Jiang, Da-Wei Wang, Jian-Ying Shi, and Cheng-Yong Su
Crystal Growth & Design 2015 Volume 15(Issue 2) pp:625
Publication Date(Web):January 8, 2015
DOI:10.1021/cg501306n
Reactions of Cu(II), Cd(II), and Ni(II) with a new tetradentate ligand N1,N3-bis(1-(1H-benzimidazol-2-yl)ethylidene)propane-1,3-diamine (H2bbepd) afforded four mononuclear pincer-like complexes of [Cu(H2bbepd)(ClO4)]·CH3OH·ClO4 (1), [Cd(H2bbepd)(CH3OH)(ClO4)]·CH3OH·ClO4 (2), [Ni(H2bbepd)(H2O)2]·2ClO4 (3), and [Ni(H2bbepd)(NO3)2] (4), respectively. The labile small coordinated components (anions or solvent molecules) on the apical coordination site of metal ions in complexes 1–4 display three different modes, which can be substituted by 4,4′-bipyridine (bpy) to obtain four new multinuclear complexes of [Cu2(H2bbepd)2(bpy)]2·4ClO4 (5), [Cd4(H2bbepd)4(bpy)3(ClO4)2]·6ClO4·(bpy)·2CH3OH·6H2O (6), {[Ni(H2bbepd)(bpy)]·2ClO4·CH3OH}n (7), and {[Ni (H2bbepd)(bpy)]·2NO3·CH3OH·H2O}n (8), respectively. Complex 5 is a binuclear dumbbell-like molecule, complex 6 is a rare example of discrete linear tetranuclear molecule, while complexes 7 and 8 are one-dimensional chains formed by an alternate arrangement of bpy molecules and mononuclear subunits. The differences in complexes 5–8 are largely dependent on the structure of the mononuclear precusors of complexes 1–4. All eight complexes are assembled into higher dimensional supramolecular frameworks by diverse nonconvalent interactions including unusual anion···π interactions between perchlorate and five-membered benzimidazole rings.
Co-reporter:Mei Pan, Cheng Yan, Ling Chen, Lu-Yin Zhang, Shao-Yun Yin, Yi-Xuan Zhu, Kai Wu, Ya-Jun Hou and Cheng-Yong Su
New Journal of Chemistry 2015 vol. 39(Issue 5) pp:3770-3776
Publication Date(Web):25 Feb 2015
DOI:10.1039/C5NJ00168D
Two series of Pb(II)–Ln(III) heteronuclear coordination complexes are assembled from a tripodal ligand triCB-NTB ((4,4′,4′′-(2,2′,2′′-nitrilotris(methylene)tris(1H-benzo[d]imidazole-2,1-diyl)tris(methylene))tribenzoic acid)). In the Pb2LnL2 series, the Ln3+ ion is encapsulated in a highly symmetrical {LnO6} octahedron with an inversion center, and Pb–Ln–Pb clusters are formed by the linkage of carboxyl groups on triCB-NTB ligands to Pb2+ and Ln3+ simultaneously. However, in the PbLn2L2 series, the Ln3+ ion is encapsulated in a distorted {LnO9} polyhedron without an inversion center. Pb2+ ions are coordinated with benzimidazole and apical N atoms on the ligand in isolation, and the carboxyl groups link two Ln3+ ions into a Ln–Ln cluster. This structural variation leads to different photoluminescence behaviour in these two series of complexes. Most importantly, the linkage of the Pb–Ln–Pb clusters causes more perturbation to the excited states of the ligand. Therefore, a more obvious ligand-to-metal charge transfer (LMCT) process is observed in the Pb2LnL2 series, and the energy transfer to the accepting levels of Ln3+ ions becomes more efficient. Furthermore, the combination of LC (ligand-centered) + LMCT + MC (metal-centered) emissions in the Pb2EuL2 complex results in single component white light emission.
Co-reporter:Ling Chen, Cheng Yan, Mei Pan, Yuan-Zhong Fan, Lu-Yin Zhang, Shao-Yun Yin, Ya-Jun Hou, Kai Wu, Ji-Jun Jiang and Cheng-Yong Su
New Journal of Chemistry 2015 vol. 39(Issue 7) pp:5287-5292
Publication Date(Web):29 Apr 2015
DOI:10.1039/C5NJ00720H
2-Methyl-8-hydroxyquinoline (HMq) and the tripodal ligands 4,4′,4′′-(2,2′,2′′-nitrilotris (methylene)tris(1H-benzo[d]imidazole-2,1-diyl)tris(methylene))tribenzonitrile (triBZ-NTB) and 4,4′,4′′-(2,2′,2′′-nitrilotris(methylene)tris(1H-benzo[d]imidazole-2,1-diyl)tris(methylene))tribenzoic acid (H3triCB-NTB) were used individually to assemble a hetero-nuclear, a tetra-nuclear and two mono-nuclear Pb(II) complexes. The Pb(II) coordination centers in two of these complexes were observed to display semidirected coordination with the ligands and counter anions (small solvent molecules), whereas the other two complexes showed holodirected coordination, together leading to varied coordination geometries. The combination of ligand-to-metal charge-transfer (LMCT) and metal-centered (MC) emissions in the semidirected Pb(II) complexes resulted in single-component white light luminescence.
Co-reporter:Ling Chen, Cheng Yan, Mei Pan, Yuan-Zhong Fan, Lu-Yin Zhang, Shao-Yun Yin, Ya-Jun Hou, Kai Wu, Ji-Jun Jiang and Cheng-Yong Su
New Journal of Chemistry 2015 vol. 39(Issue 11) pp:9029-9029
Publication Date(Web):05 Oct 2015
DOI:10.1039/C5NJ90044A
Correction for ‘Semidirected versus holodirected coordination and single-component white light luminescence in Pb(II) complexes’ by Ling Chen et al., New J. Chem., 2015, 39, 5287–5292.
Co-reporter:Xun-Zhong Zou, Jing-An Zhang, Li-Jie Zhang, Ya-Jie Liu, Ning Li, Yu Li, Shi-Chao Wei, Mei Pan
Inorganic Chemistry Communications 2015 Volume 54() pp:21-24
Publication Date(Web):April 2015
DOI:10.1016/j.inoche.2015.01.029
•Four complexes based on a quinoline thioether ligand were synthesized.•The structures of the compounds were characterized.•The antibacterial and pesticide activities of the compounds were tested.The ligand 2,6-bis (8-quinolinylthiomethyl) pyridine and its four transition metal complexes have been synthesized and characterized by elemental analysis (EA), infrared spectra (IR) and single-crystal diffraction. It was revealed that compounds 1–3 were comprised of discrete mononuclear units and double nuclear structure in compound 4. The antibacterial activities and pesticide activities of the ligand and complexes 1–4 were tested. The results showed that some compounds had absolute specificity for certain bacteria, and could have good application prospect in pharmaceutical and agricultural use.Fig. 1(a) view of the coordination environment of Cu(II) ions in 1. (b) View of the coordination environment of Cd(II) ions in 2. (c) View of the coordination environment of Zn(II) ions in 3.Figure optionsDownload full-size imageDownload as PowerPoint slide
Co-reporter:Hai-Ping Wang, Shao-Yun Yin, Mei Pan, Kai Wu, Ling Chen, Yi-Xuan Zhu, Ya-Jun Hou
Inorganic Chemistry Communications 2015 Volume 54() pp:92-95
Publication Date(Web):April 2015
DOI:10.1016/j.inoche.2015.02.013
•The CD signals of a pair of chiral tripodal ligands can be magnified by metal coordination.•Different coordination modes of the metal centers are responsible for discriminative CD responses.The coordination of metal ions with a pair of chiral tripodal ligands (R or S)-2-(2-((bis(pyridin-2-ylmethyl)amino)methyl)phenoxy)-N-(1-phenylethyl)acetamide (R- or S-L) results in the circular dichroism (CD) enhancement distinctly, giving fingerprint information among different metals. Specifically, the CD signals show more obvious magnification upon coordination with Ln3 + compared with Zn2 + and other metals. Structural analyses show that in Eu-complex (1), the Eu3 + metal center is surrounded in a 10-coordinating geometry and the ligand takes fan-like configuration, while in Zn-complex (2), Zn2 + is surrounded in a 7-coordinating geometry and the ligand takes pincer-like configuration. These differences in the coordination structure as well as intramolecular packing effects are responsible for the variation in CD signal responses of different metal-coordinated systems.The coordination of different metal ions with a pair of chiral tripodal ligands results in discriminatively magnified CD signal responses, which can be applied as a potential CD “switch” or “regulator”.
Co-reporter:Sheng-Run Zheng, Shao-Yun Yin, Mei Pan, Ling Chen, Bin-Bin Du, Ya-Jun Hou, Kai Wu, Yi-Xuan Zhu, Ji-Jun Jiang
Inorganic Chemistry Communications 2015 Volume 55() pp:116-119
Publication Date(Web):May 2015
DOI:10.1016/j.inoche.2015.03.022
•Solvent-mediated structural transition between (4,4)-net and CdI2-net•Thermodynamically favored conversion by recrystallization process.•A mixture can be converted into pure substance in this way.The coordination of a rigid triangular ligand 2,4,6-tris[4-(1H-imidazole-1-yl)phenyl]-1,3,5-triazine (TIPT) with Cd(II) ions afforded two compounds with structural motifs of a CdI2-type and a (4,4) network for anions OTf− (CF3SO3−) and OTs− (p-CH3C6H5SO3−), respectively, between which structural transition can be induced by anion exchange via solvent-mediated recrystallization process. Using this method, a pure substance can be obtained from a mixture under the excess of certain kind of anions.Structural transition between (4,4)-net and CdI2-net can be induced by anion exchange via solvent-mediated recrystallization process in Cd(II) complexes.
Co-reporter:Kang Li ; Lu-Yin Zhang ; Cheng Yan ; Shi-Chao Wei ; Mei Pan ; Li Zhang ;Cheng-Yong Su
Journal of the American Chemical Society 2014 Volume 136(Issue 12) pp:4456-4459
Publication Date(Web):March 10, 2014
DOI:10.1021/ja410044r
Stepwise synthesis of nanosized Pd−Ru heteronuclear metal–organic cages from predesigned redox- and photo-active Ru(II)-metalloligand and naked Pd(II) ion is described. The resulting cage shows rhombododecahedral shape and contains a 5350 Å3 cavity and 12 open windows, facilitating effective trapping of both polar and nonpolar guest molecules. Protection of photosensitive guests against UV radiation is studied.
Co-reporter:Qing-Yuan Yang, Kai Wu, Ji-Jun Jiang, Chien-Wei Hsu, Mei Pan, Jean-Marie Lehn and Cheng-Yong Su
Chemical Communications 2014 vol. 50(Issue 57) pp:7702-7704
Publication Date(Web):30 May 2014
DOI:10.1039/C4CC01763C
Direct white-light emission was first achieved in a single phase material of a Dy(III) metal–organic framework, which also shows tunable yellow-to-blue photoluminescence upon variation of excitation wavelengths.
Co-reporter:Qing-Yuan Yang, Mei Pan, Shi-Chao Wei, Chien-Wei Hsu, Jean-Marie Lehn and Cheng-Yong Su
CrystEngComm 2014 vol. 16(Issue 28) pp:6469-6475
Publication Date(Web):13 May 2014
DOI:10.1039/C4CE00586D
A new semi-rigid tripodal ligand, namely 1,1′,1′′-((2,4,6-triethylbenzene-1,3,5 triyl)tris(methylene))tris(pyridin-4(1H)-one) (L1), has been prepared by direct alkylation of 4-hydroxypyridine at the nitrogen site with 1,3,5-tris(bromomethyl)-2,4,6-triethylbenzene. The tripodal ligand has been used for the assembly of a series of isomorphous lanthanide metal–organic frameworks (Ln-MOFs) [Ln(L1)·(NO3)3]·nH2O (Ln = Eu (1), Tb (2), Sm (3), Ce (4), Gd (5); n = 3 or 4) which exhibit an unusual non-interpenetrated (10,3)-d (or utp net) topology. The photophysical properties of these lanthanide MOFs have been assessed, in which the Tb3+ complex 2 displays bright green luminescence with quite high efficiency (Φoverall = 50%) and a long excited state lifetime (τobs = 1.1 ms).
Co-reporter:Mei Pan and Cheng-Yong Su
CrystEngComm 2014 vol. 16(Issue 34) pp:7847-7859
Publication Date(Web):09 May 2014
DOI:10.1039/C4CE00616J
The Borromean link constitutes an intriguing type of entanglement and knot in both discrete coordination architectures (Borromeate or Borromeand) and infinite coordination assemblies (Borromean networks), and is characteristic of nontrivial three-ring links which are inseparable as a whole while cleavage of any ring makes the whole fall apart. This highlight paper covers recent advances in the assembly of coordination supramolecular structures showing Borromean-linking topological character.
Co-reporter:Ling Chen, Cheng Yan, Bin-Bin Du, Kai Wu, Lu-Yin Zhang, Shao-Yun Yin, Mei Pan
Inorganic Chemistry Communications 2014 Volume 47() pp:13-16
Publication Date(Web):September 2014
DOI:10.1016/j.inoche.2014.07.009
•Nd and Yb can be efficiently sensitized by the new Schiff base ligand.•Red emission of the ligand is affected by the coordination of Eu, Tb, and Gd with Zn.•Nonlinear optical properties were obtained in these complexes.Starting from a Schiff base ligand containing 8-hydroxyquinoline moiety, namely, 3,3′-(1E,1′E)-(propane-1,3-diylbis(azan-1-yl-1-ylidene))bis(methan-1-yl-1-ylidene) diquinolin-8-ol (H2PBIQ), five heteronuclear Ln(III)–Zn(II) complexes (([Eu2Zn(PBIQ)2(NO3)4]⋅CH2Cl2, 1), ([Tb2Zn(PBIQ)2(NO3)4]⋅CH2Cl2, 2), ([Gd2Zn(PBIQ)2(NO3)4]⋅CH2Cl2, 3), ([Nd2Zn(PBIQ)2(NO3)4]⋅CH2Cl2, 4)), and ([Yb2Zn(PBIQ)2(NO3)4]⋅CH2Cl2, 5) were obtained. Due to the low energy level resided in the excited state, the Schiff base ligand can sensitize near infrared emitting Ln(III) ions (Nd and Yb), while visible light emitting Eu and Tb ions cannot be excited. Instead, nonlinear optical properties were observed in Eu/Tb–Zn heteronuclear complexes.Vis–NIR emission and nonlinear optical properties were observed in d–f heteronuclear complexes from a Schiff base ligand containing 8-hydroxyquinoline moiety.
Co-reporter:Lei Fu, Yu Liu, Mei Pan, Xiao-Jun Kuang, Cheng Yan, Kang Li, Shi-Chao Wei and Cheng-Yong Su
Journal of Materials Chemistry A 2013 vol. 1(Issue 30) pp:8575-8580
Publication Date(Web):10 May 2013
DOI:10.1039/C3TA11157A
A microporous coordination framework formed by hydrogen-bonding directed assembly of Cu(II) hexanuclear rings can act as a host for iodine accumulation in an aqueous solution. Various iodine species, I−, I3− or I2, are able to be trapped in the hydrophilic voids of the crystals via a single-crystal-to-single-crystal ion-exchange process. The chemical nature of the iodine species encapsulated inside the coordination framework have been established by single crystal and powder XRD, IR, XPS, EA, TG and iodometric methods. Furthermore, the accumulated iodine species can be easily extracted from the crystals by organic solvents. The kinetics of I3− release from the crystals by extraction with ethanol has been studied.
Co-reporter:Lu-Yin Zhang, Yu Liu, Kang Li, Mei Pan, Cheng Yan, Shi-Chao Wei, Yong-Xin Chen and Cheng-Yong Su
CrystEngComm 2013 vol. 15(Issue 35) pp:7106-7112
Publication Date(Web):11 Jul 2013
DOI:10.1039/C3CE40845K
The reactions of pyridyl-substituted tripodal ligand 3-TPyMNTB (tris((pyridin-3-ylmethyl)benzimidazol-2-ylmethyl)amine) with Cu(II) chloride give rise to two supramolecular complexes, namely, [Cu5(3-TPyMNTB)2Cl10H2O]·6C3H7NO·11H2O (1), and [Cu5(3-TPyMNTB)2Cl8(H2O)2]Cl2·2CHCl3·2CH2OH (2). The assembly of the two complexes takes place in a stepwise route, including: (1) identical monomeric ML building units are firstly formed in both cases by the coordination of Cu(II) with 3-TPyMNTB using its four central N donors, and (2) the ML units are further linked by the 2-connecting Cu(II) ions through extending pyridyl terminals on the ligands into 0D discrete or 1D infinite structures in complexes 1 and 2, respectively. As a result, 1 presents a unique example of a M5L2 coordination cage which shows a triple helicate shape. Three Bim–Py–Cu(II)–Py–Bim coordination chains constitute the strands of the helicate, which can be outlined by an extending “molecular clip” approach, and such structural character is analyzed in detail in comparison with other known helicate examples. On the other hand, a 1D loop-and-chain structure is formed in complex 2, which can be seen as one strand of the helicate cage in complex 1 being opened up to undergo polymerization. The oxidation catalytic properties of complexes 1 and 2 are tested.
Co-reporter:Yu Li, Jing-An Zhang, Yi-Bo Wang, Mei Pan, Cheng-Yong Su
Inorganic Chemistry Communications 2013 Volume 34() pp:4-7
Publication Date(Web):August 2013
DOI:10.1016/j.inoche.2013.04.028
•Three mono/di-nuclear Hg complexes are assembled from a pentadentate ligand.•Hg(II) in complex 3 is reduced in-situ to form Hg(I)-Hg(I) σ bond.•The ligand and complexes show potential applications in biological activities.Three mercury complexes from a symmetric pentadentate ligand 2, 6-bis (8-quinolinyl thiomethyl) pyridine (L) have been prepared by the method of diffusing of diethyl ether or diisopropyl ether. The structures of the complexes have been identified by elemental analysis (EA), infrared spectra (IR) and single-crystal diffraction, and are composed of discrete mononuclear units in complexes 1 and 2 and binuclear units in complex 3. Especially, the valence of Hg in complex 3 is reduced to − 1 in-situ during self-assembly and HgHg σ bond is formed, which is further evidenced by the frontier orbital and natural bond orbital (NBO) properties calculated by DFT method. The antibacterial and antifungal activities of the ligand and the three complexes were also determined, which prove foundation information for research and application in pharmaceutical chemicals.In the present work, three Hg(II) complexes [Hg(L)Cl2], [Hg(L)] · (ClO4)2 and [Hg2(L)2](ClO4)2 · H2O of 2, 6-bis (8-quinolinylthiomethyl) pyridine (L) have been prepared and structurally characterized. The microbial activity of the ligand and three Hg(II) complexes were determined.
Co-reporter:Jing-An Zhang, Mei Pan, Ji-Jun Jiang, Zhi-Gang She, Zhi-Jin Fan, Cheng-Yong Su
Inorganica Chimica Acta 2013 400() pp: 1
Publication Date(Web):
DOI:10.1016/j.ica.2013.02.007
Co-reporter:Cheng Yan, Kang Li, Shi-Chao Wei, Hai-Ping Wang, Lei Fu, Mei Pan and Cheng-Yong Su
Journal of Materials Chemistry A 2012 vol. 22(Issue 19) pp:9846-9852
Publication Date(Web):13 Apr 2012
DOI:10.1039/C2JM00001F
In this paper, we report the design of a new functionalized tripodal ligand triCB-NTB (4,4′,4′′-(2,2′,2′′-nitrilotris(methylene)tris(1H-benzo[d]imidazole-2,1-diyl)tris(methylene))tribenzoic acid) and its assembly of Eu(III) homometallic or Zn(II)-Eu(III) heterometallic lanthanide-based metal–organic frameworks (MOFs). C3 symmetric Eu(III) center is achieved in the homometallic MOF, [Eu(triCB-NTB)]·DMAc·4H2O (1). The C3 axis of the three coordinated imino N atoms on the propeller-extended central triCB-NTB ligand coincides with the C3 axis that directs the three para-methyl carboxylic benzene arms on three surrounding ligands coordinating with the central Eu(III) simultaneously. Therefore, a (6, 3) pattern is formed in the framework with relatively large porosity. In the Zn-Eu heterometallic framework, [EuZn(triCB-NTB)(H2O)(Cl)2]·2DMAc·H2O (2), the N atoms on the triCB-NTB are coordinated with Zn(II) and the carboxylic O atoms are coordinated with Eu(III). A paddle-wheel linked Eu(III)2 cluster is formed and 1D loop-and-chain structure is obtained. Two ligands, two Zn(II) ions and two Eu(III)2 clusters constitute one box-like unit on the loop chain. Due to the non-inversion symmetry imposed on the central Eu(III) and the large polarizability of the ligand, both one photon (OP) luminescence based on the energy transfer from the ligand to Eu3+ and two photon (TP) luminescence based on the hypersensitive transition of the Eu3+ ions are observed in the two lanthanide-based MOFs. This satisfies the urgent needs of multi-mode luminescent lanthanide complex. Simultaneously, N2 gas and selective vapor adsorptions were also detected in the porous structure of complexes 1 and 2 due to their benzene-filled channels. The six-pointed-star like cavities in 1 can let the gas and vapor molecules go in and out smoothly subject to changes in the pressure, while the narrower and more irregular channels in 2 show irreversible adsorption behavior for benzene and cyclohexane vapor molecules in vacuum under room temperature.
Co-reporter:Lei Fu, Mei Pan, Yan-Hu Li, Hong-Bin Wu, Hai-Ping Wang, Cheng Yan, Kang Li, Shi-Chao Wei, Zi Wang and Cheng-Yong Su
Journal of Materials Chemistry A 2012 vol. 22(Issue 42) pp:22496-22500
Publication Date(Web):04 Sep 2012
DOI:10.1039/C2JM34992B
A novel butterfly-like Ir(III) complex is designed, synthesized, and characterized for highly efficient yellow phosphorescent polymer-based light-emitting diodes (PLEDs). The device shows a maximum external quantum efficiency of 19.2%, luminance efficiency of 40 cd A−1 and Commission International de L'Eclairage (CIE) color coordinates of (0.49, 0.50) at J = 1.2 mA cm−2.
Co-reporter:Kang Li, Yu Liu, Cheng Yan, Lei Fu, Shi-Chao Wei, Hai-Ping Wang, Mei Pan and Cheng-Yong Su
CrystEngComm 2012 vol. 14(Issue 11) pp:3868-3874
Publication Date(Web):13 Apr 2012
DOI:10.1039/C2CE06605J
In this paper, we report the design and synthesis of two pyridyl-substituted tripodal ligands, 3-TPyMNTB (tris(((pyridin-3-ylmethyl)benzimidazol-2-yl)methyl)amine) and 4-TPyMNTB (tris(((pyridin-4-ylmethyl)benzimidazol-2-yl)methyl)amine). Reaction of these two ligands with Eu(III)/Tb(III) picrate salts gives mononuclear complexes [Eu(3-TPyMNTB)(pic)3]·2H2O (1) and [Tb(3-TPyMNTB)(pic)3]·2H2O (2), respectively. While reaction with Eu(III)/Tb(III) nitrate salts leads to cocrystallization of a coordinative motif and an inorganic salt in one single-crystal, namely, [Eu(3-TPyMNTB)(NO3)3]·0.5[Eu(NO3)3(H2O)4]·3CH3CN (3), [Tb(3-TPyMNTB)(NO3)3]·0.5[Tb(NO3)3(H2O)4]·3CH3CN·1.5C2H5OH (4), [Eu(4-TPyMNTB)(NO3)3]·[Eu(NO3)3(H2O)3]·3CH3CN·0.5H2O (5) and [Tb(4-TPyMNTB)(NO3)3]·[Tb(NO3)3(H2O)3]·3CH3CN·0.5H2O (6). In these cocrystals, the organic ligand-coordinated motif [Ln(3(4)-TPyMNTB)(NO3)3] and the nitrate anion-bonded motif [Ln(NO3)3(H2O)n] (Ln = Eu(III) or Tb(III), n = 3 or 4) provide two Eu(III)/Tb(III) centers which coexist in the same crystal lattice. Of most interest, both coordinative and inorganic centers can be excited by the absorption of the organic ligand, that is, the double luminescent centers in the cocrystalline systems can be sensitized by the same antenna source. Therefore, both Dexter and Förster mechanisms are proposed to be involved in the emission process, in which the energy transfer is conducted either through direct bond linkages or through space from unlinked organic antennae.
Co-reporter:Zhi-Quan Yu, Mei Pan, Ji-Jun Jiang, Zhi-Min Liu, and Cheng-Yong Su
Crystal Growth & Design 2012 Volume 12(Issue 5) pp:2389-2396
Publication Date(Web):March 23, 2012
DOI:10.1021/cg300051w
Reaction of a balance-like dipodal ligand 2,6-bis(pyridiyl) hexahydro-4,8-ethenopyrrolo [3,4-f]isoindole-1,3,5,7-tetrone (3-pybtd) with various Cd(II) salts afforded eight complexes, namely, [Cd2(3-pybtd)2(NO3)4(C2H5OH)2(H2O)2] (1), [Cd2(3-pybtd)2(SiF6)2(DMF)4(H2O)2](H2O)4·(DMF)2 (2), {[Cd(3-pybtd)2(H2O)4](ClO4)2}n (3), {[Cd(3-pybtd)2(OTf)2]·THF}n (4), {[Cd(3-pybtd)2(SCN)2]·(H2O)2}n (5), [Cd(3-pybtd)(OTs)2(DMF)2]n (6), [Cd(3-pybtd)2(OTs)2]n (7), and {[Cd2(3-pybtd)2Cl10/3][CdCl8/3]·(H2O)3}n (8). Complexes 1 and 2 are zero-dimensional (0D) square-like or olive-like dimeric M2L2 metallacycles, showing a pair of shape-modified molecular rectangles due to different conformations of the ligands and coordination orientation of the metal centers. Complexes 3–5 are one-dimensional (1D) looplike chains composed of olive-like M2L2 metallacycle building units as in 2, showing 0D → 1D dimension increase via ligand addition, while complex 8 is a three-dimensional (3D) framework retaining the same olive-like M2L2 metallacycle, showing 0D → 3D dimension increase via linkage of μ3-Cl bridged Cd(II) clusters. Complex 6 is a wave-like MnLn chain, possessing the same ML building units as in 1 but showing 0D → 1D dimension increase via ring-opening polymerization. Replacement of DMF molecules from the coordination sphere in 6 by the ligands resulted in a two-dimensional (2D) (4, 4) network of 7, showing 1D → 2D dimension increase from 6 via ligand addition or 1D → 2D dimension increase from 3–5 via ring-opening polymerization. Complexes 3–5 also represent a series of supramolecular isomorphs displaying anion exchange properties. Electrospray ionization mass spectrometry (ESI-MS) studies in solution suggest that the discrete and infinite structures in 1, 6, and 7 are assembled from the same monomeric ML building blocks, which crystallize in a different way to lead to structural diversification via dimerization or polymerization during the crystallization.
Co-reporter:Jia-Jian Jiang;Cheng Yan;Zi Wang;Hai-Ying Deng;Jian-Rong He;Qing-Yuan Yang;Lei Fu;Xian-Fang Xu;Cheng-Yong Su
European Journal of Inorganic Chemistry 2012 Volume 2012( Issue 8) pp:1171-1179
Publication Date(Web):
DOI:10.1002/ejic.201101181
Abstract
A new end–core–end naphthalenediimide-based ligand N,N′-bis(3-imidazol-1-yl-propyl)naphthalene diimide (3-imntd) was synthesized. Single crystals of the free ligand and its HgII, CdII, and CuII halide complexes were obtained. All the compounds were fully characterized by elemental analysis, IR spectroscopy, single-crystal XRD, and DFT studies. The XRD and DFT calculations revealed three different kinds of conformations for 3-imntd (cis, trans, and L). The variation in the ligand conformation and the resulting final structures of the coordination assemblies, M2L2 metallacycle, 1D zigzag chain, or ML metallacycle, seem to be induced by the different geometric characters of the coordination tetrahedra around the metal centers. The optical and electrochemical properties of the compounds were also investigated.
Co-reporter:Jia-Jian Jiang;Cheng Yan;Zi Wang;Hai-Ying Deng;Jian-Rong He;Qing-Yuan Yang;Lei Fu;Xian-Fang Xu;Cheng-Yong Su
European Journal of Inorganic Chemistry 2012 Volume 2012( Issue 8) pp:
Publication Date(Web):
DOI:10.1002/ejic.201290017
Co-reporter:Hai-Ping Wang, Shi-Chao Wei, Mei Pan, Kang Li, Zi Wang, Cheng Yan, Cheng-Yong Su
Inorganic Chemistry Communications 2012 Volume 25() pp:48-50
Publication Date(Web):November 2012
DOI:10.1016/j.inoche.2012.09.010
A pentadentate ligand L (2-(2-((bis(pyridin-2-ylmethyl)amino)methyl)phenoxy) -N,N-diphenylacetamide) was self-assembled with Eu (NO3)3 or Zn (NO3)2/Eu (NO3)3 to give homometallic complex ([EuL(NO3)3], 1) or ion associating complex ([ZnL(NO3)]2·[Eu(NO3)5]·CH3CN, 2), respectively. The photoluminescent behavior and energy transfer process were studied in the two complexes by excitation in different ways, in which 2 shows Förster energy transfer mechanism.Förster energy transfer can happen in Eu–Zn ion associating complex.Highlights► Using the same pentadentate ligand, homometallic Eu and ion associating Eu–Zn complexes are obtained. ► Förster energy transfer can happen in Eu–Zn ion associating complex.
Co-reporter:Mei Pan, Xiao-Ming Lin, Guo-Bi Li, Cheng-Yong Su
Coordination Chemistry Reviews 2011 Volume 255(15–16) pp:1921-1936
Publication Date(Web):August 2011
DOI:10.1016/j.ccr.2011.03.013
1,4,5,8-naphthalenediimide (NDI) derivatives are versatile in coordination and material chemistry due to their large conjugated planar structure and special electron transfer properties. This review presents an overview of metal–organic materials derived from NDIs with their structural models, analytical techniques and potential applications outlined.Graphical abstract. A short summary of the metal–organic materials based on 1,4,5,8-naphthalenediimides (NDIs) is presented with respect to their structural models, analytical techniques and potential applications.Highlights► NDIs show versatile conformational and electronic structures. ► Metal–organic materials based on NDIs show diversified structures and applications. ► Various analytical techniques have been applied in the study of the NDIs systems.
Co-reporter:Mei Pan, Xue-Tao Wang, Guo-Jun Ke, Xiao-Jiang Shi, Miao-Qi Li
Inorganic Chemistry Communications 2011 Volume 14(Issue 5) pp:781-783
Publication Date(Web):May 2011
DOI:10.1016/j.inoche.2011.03.023
Tripodal ligand NTB (N-substituted tris(benzimidazol-2-ylmethyl)amine) was functionalized with 3-(animopropyl) triethoxysilane (APTEOS) to give a new bifunctional ligand Si-CNTB. The coordination of N atoms on Si-CNTB with Ln(III) ions afforded efficient luminescent centers and the co-hydrolyzation of silane groups with TEOS (tetraethoxysilane) produced covalently linked hybrid particles in sub-micron scale. Visible to near infrared photoluminescence and N2 adsorption properties were observed in this new type of inorganic–organic hybrid materials.Ce/Tb/Yb/Er(III) sub-micron hybrid particles were obtained by the covalently linking of a modified NTB ligand with long-chain silicon ester groups to the in-situ generated Si―C and Si―O―Si host. The obtained materials show both sensitized luminescence of lanthanide ions and gas adsorption behavior.Research highlights► A novel series of covalently linking Ln(III) hybrid materials are synthesized. ► The hybrid materials show special sensitized luminescence of Ln(III) ions. ► The hybrids also show efficient gas adsorption behavior.
Co-reporter:Jing-An Zhang, Mei Pan, Ji-Jun Jiang, Zhi-Gang She, Zhi-Jin Fan, Cheng-Yong Su
Inorganica Chimica Acta 2011 Volume 374(Issue 1) pp:269-277
Publication Date(Web):1 August 2011
DOI:10.1016/j.ica.2011.02.073
Eleven transition metal complexes of three asymmetrical tridentate thioether ligands, 8-((pyridin-2-yl)methylthio) quinoline (TQMP2), 8-((pyridin-3-yl)methylthio) quinoline (TQMP3), 8-((pyridin-4-yl)methylthio) quinoline (TQMP4) and one symmetrical pentadentate ligand 2,6-bis (8-quinolinylthiomethyl) pyridine (DTQMP) were prepared. The structures of all these complexes were identified by means of elemental analysis (EA), infrared spectra (IR) and single-crystal diffraction, providing three different kinds of basic conformations, (1) discrete mononuclear structures, (2) dinuclear rings and (3) 1D polymer chains. The antibacterial, antifungal and pesticide activities of the four ligands and 11 complexes were also studied.Graphical abstractFour thioether ligands containing pyridine and quinoline groups were designed and coordinated with transition metals into 11 complexes with various kinds of structural modes. The biological activities of the ligands and complexes were studied comparatively.Highlights► Four thioether ligands containing pyridine and quinoline groups were synthesized. ► Transition metal complexes with various kinds of coordination modes were assembled. ► The ligands and complexes show efficient biological activities.
Co-reporter:Mei Pan, Mei-Hua Lan, Xue-Tao Wang, Cheng Yan, Yu Liu, Cheng-Yong Su
Inorganica Chimica Acta 2010 Volume 363(Issue 14) pp:3757-3764
Publication Date(Web):25 November 2010
DOI:10.1016/j.ica.2010.05.035
Fourteen ytterbium(III) complexes of the tripodal ligands triRNTB (N-substituted tris(benzimidazol-2-ylmethyl)amine) have been prepared and characterized by elemental analysis (EA), infrared spectra (IR), electrospray ionization mass spectrometry (ESI-MS) and single-crystal diffraction analysis. Their coordination conformations can be divided into three different types due to the introduction of secondary ligands or counter anions, i.e. ML2, MLL3′, and MLA3 types, therefore resulting in different coordination symmetry on the central Yb(III) ions. Accordingly, the near infrared photoluminescence and photophysical properties of the complexes show contrasting results in peak splitting behavior, lifetime, and quantum efficiency, among which the ML2 type displaying the most complicated splitting, the shortest lifetime and the smallest quantum efficiency.The coordination conformations of 14 Yb(III) complexes of the tripodal ligands triRNTB can be divided into three different types due to the introduction of secondary ligands and counter anions. Accordingly, the near infrared photoluminescence of the complexes show contrasting results in peak splitting behavior.
Co-reporter:Jing-An Zhang, Mei Pan, Rui Yang, Zhi-Gang She, Wolfgang Kaim, Zhi-Jin Fan, Cheng-Yong Su
Polyhedron 2010 29(1) pp: 581-591
Publication Date(Web):
DOI:10.1016/j.poly.2009.07.024
Co-reporter:Mei Pan, Mei-Hua Lan, Ji-Jun Jiang, Qing-Yuan Yang, Cheng-Yong Su
Journal of Molecular Structure 2010 980(1–3) pp: 193-200
Publication Date(Web):
DOI:10.1016/j.molstruc.2010.07.013
Co-reporter:Jing-An Zhang, Mei Pan, Jian-Yong Zhang, Bei-Sheng Kang, Cheng-Yong Su
Inorganica Chimica Acta 2009 Volume 362(Issue 10) pp:3519-3525
Publication Date(Web):1 August 2009
DOI:10.1016/j.ica.2009.03.041
Four cadmium(II) complexes of the semirigid tridentate ligand 8-[(pyridin-4-yl)methylthio] quinoline (TQMP4, L), namely, [CdL2](ClO4)2 (1), [Cd(L)Br2] (2), [Cd2(L)2(NO3)4] (3), and [Cd2(L)2I4] (4), have been prepared by the methods of layering and the diffusing of diethyl ether. The structures of the complexes have been identified by elemental analysis (EA), infrared spectra (IR) and single-crystal diffraction. The different coordination modes of the ligands and counter anions result in a 2D (4, 4) net structure in complex 1, a 1D polymer chain in complex 2, and 0D binuclear rings in complexes 3 and 4. Their antibacterial and antifungal activities were also tested.Complexes with 2D net, 1D chain and 0D dimetallic-ring structures are formed by semirigid tridentate ligand TQMP4 with different cadmium salts, respectively. Their biological activities are also studied.
Co-reporter:Jing-An Zhang, Mei Pan, Jian-Yong Zhang, Hai-Ke Zhang, Zhi-Jin Fan, Bei-Sheng Kang, Cheng-Yong Su
Polyhedron 2009 28(1) pp: 145-149
Publication Date(Web):
DOI:10.1016/j.poly.2008.09.029
Co-reporter:Lu-Yin Zhang, Ya-Jun Hou, Mei Pan, Ling Chen, Yi-Xuan Zhu, Shao-Yun Yin, Guang Shao and Cheng-Yong Su
Dalton Transactions 2015 - vol. 44(Issue 34) pp:NaN15219-15219
Publication Date(Web):2015/04/13
DOI:10.1039/C5DT00545K
Four Ru(II)/Ir(III) metalloligands have been designed and synthesized from polypyridine and bibenzimidazole (BiBzIm) organic ligands, which show strong visible light absorption via metal-to-ligand charge transfer (MLCT) transitions. Nd/Yb(III) complexes were further assembled from these Ru(II)/Ir(III) metalloligands, and Ln(III)-centered NIR emissions can be efficiently sensitized by 3MLCT states of the metalloligands in the visible-light region. The energy transfer rates for the complexes are generally in the order Nd > Yb, which is due to the better matching between 3MLCT states of Ru(II)/Ir(III) metalloligands and densely distributed excited states of Nd(III) ions. Long decayed lifetimes on a μs scale and high quantum yields up to 1% are obtained in these lanthanide complexes, suggesting that the Ru(II)/Ir(III) metalloligands can serve as a good visible light harvesting antenna to efficiently sensitize Ln(III)-based NIR luminescence.
Co-reporter:Bin-Bin Du, Yi-Xuan Zhu, Mei Pan, Mei-Qin Yue, Ya-Jun Hou, Kai Wu, Lu-Yin Zhang, Ling Chen, Shao-Yun Yin, Ya-Nan Fan and Cheng-Yong Su
Chemical Communications 2015 - vol. 51(Issue 63) pp:NaN12536-12536
Publication Date(Web):2015/06/29
DOI:10.1039/C5CC04468E
Direct white-light emission and further a dual-channel readable barcode module in both visible and NIR region was established by single-component homo-metallic Pr(III)-MOF crystals for the first time.
Co-reporter:Qing-Yuan Yang, Kai Wu, Ji-Jun Jiang, Chien-Wei Hsu, Mei Pan, Jean-Marie Lehn and Cheng-Yong Su
Chemical Communications 2014 - vol. 50(Issue 57) pp:NaN7704-7704
Publication Date(Web):2014/05/30
DOI:10.1039/C4CC01763C
Direct white-light emission was first achieved in a single phase material of a Dy(III) metal–organic framework, which also shows tunable yellow-to-blue photoluminescence upon variation of excitation wavelengths.
Co-reporter:Lei Fu, Yu Liu, Mei Pan, Xiao-Jun Kuang, Cheng Yan, Kang Li, Shi-Chao Wei and Cheng-Yong Su
Journal of Materials Chemistry A 2013 - vol. 1(Issue 30) pp:NaN8580-8580
Publication Date(Web):2013/05/10
DOI:10.1039/C3TA11157A
A microporous coordination framework formed by hydrogen-bonding directed assembly of Cu(II) hexanuclear rings can act as a host for iodine accumulation in an aqueous solution. Various iodine species, I−, I3− or I2, are able to be trapped in the hydrophilic voids of the crystals via a single-crystal-to-single-crystal ion-exchange process. The chemical nature of the iodine species encapsulated inside the coordination framework have been established by single crystal and powder XRD, IR, XPS, EA, TG and iodometric methods. Furthermore, the accumulated iodine species can be easily extracted from the crystals by organic solvents. The kinetics of I3− release from the crystals by extraction with ethanol has been studied.
Co-reporter:Wei-Xu Feng, Shao-Yun Yin, Mei Pan, Hai-Ping Wang, Ya-Nan Fan, Xing-Qiang Lü and Cheng-Yong Su
Journal of Materials Chemistry A 2017 - vol. 5(Issue 7) pp:NaN1750-1750
Publication Date(Web):2017/01/16
DOI:10.1039/C6TC04851J
By anchoring lanthanide coordination monomers onto a PMMA polymer backbone via a pre-designed vinylbenzyl-substituted NTB-type ligand, we succeeded in the fabrication of homo or hetero Ln-metallopolymers that can emit tunable and designable multicoloured photoluminescence as well as white light emission. Copolymerization results in the fine-tuning of the energy state of the ligand in the metallopolymer compared with that in the coordination monomer, thereby changing the energy transfer efficiency to Eu3+ and Tb3+ centers in opposite ways. And further designing of hetero-lanthanide metallopolymers leads to additional energy transfer between Eu3+ and Tb3+, facilitating the generation of pure white light emission. In general, the facile and controllable synthesis procedure, versatile and reproducible combination of lanthanides, ligands and polymer backbones, and relatively high white light emitting luminous efficiency (>5%) prove this method to be promising in future lighting WPLED applications.
Co-reporter:Lu-Yin Zhang, Shao-Yun Yin, Mei Pan, Wei-Ming Liao, Jian-Hua Zhang, Hai-Ping Wang and Cheng-Yong Su
Journal of Materials Chemistry A 2017 - vol. 5(Issue 20) pp:NaN9814-9814
Publication Date(Web):2017/04/12
DOI:10.1039/C7TA00508C
Four butterfly-like binuclear Ru(II)–Ru(II) and Ir(III)–Ru(II) complexes were designed and synthesized via a stepwise method by Ru(II)/Ir(III) metalloligands containing polypyridine (bpy)/phenylpyridine (ppy), phenanthroline (phen) and bibenzimidazole (BiBzIm) moieties. The absorption and photoluminescence of Ru(II)–Ru(II) compounds are dominated by metal-to-ligand charge-transfer (MLCT) transitions from Ru(II) centers to the organic ligand parts, which emit in the deep red region with a wavelength ∼700 nm. While in Ir(III)–Ru(II) complexes, an additional decay channel is opened for the energy transfer from the higher energy level MLCT state of Ir(III)-coordinated units to the lower-energy level MLCT state of Ru(II)-coordinated units, as approved by both experimental and theoretical DFT calculations. Therefore, similar deep red emission profiles originating from Ru(II) units are observed in Ir(III)–Ru(II) systems. These binuclear complexes were further tested as photosensitizers (PSs) to produce H2 in photocatalytic water reduction systems. The highest H2 production efficiency can be obtained in the heteronuclear IrRu(1) system after 80 hours continuous production with a TON value of 1088 based on the amount of IrRu(1) as PS, much higher than the other binunclear complexes and mononuclear counterparts. The results provide a new insight into the designing guidelines for noble metal complexes as emitting centers and photosensitizers in lighting/display materials and devices, as well as photocatalytic water splitting systems.
Co-reporter:Jing-Xiang Zhang, Mei Pan and Cheng-Yong Su
Journal of Materials Chemistry A 2017 - vol. 5(Issue 24) pp:NaN4632-4632
Publication Date(Web):2017/05/08
DOI:10.1039/C7TB00702G
The combination of chemotherapy with photodynamic therapy can lead to improved therapeutic efficiencies and reduced side effects compared to conventional chemotherapy. Chlorambucil (CHL) is a DNA alkylating agent, but problems like drug instability, “off-target” binding and in situ monitoring after administration often limit its clinical application. In this regard, we designed a new heteroleptic Ru(II) complex CHL-RuL, bearing a CHL conjugated pendant, which is desired to serve as an image-guided chemo-photodynamic combined theranostic agent. CHL-RuL shows considerable promise as a photosensitizer for two-photon excitation photodynamic therapy: strong and wide UV-Vis absorption bands centered around 400 nm, strong red emission (∼702 nm) with a long lifetime at the microsecond level, moderate singlet oxygen quantum yield, and significant two-photon absorption cross-section (118 GM). More interestingly, this chemical modification affords CHL-RuL greater cellular uptake and remarkable mitochondria accumulation in HeLa cells. Furthermore, CHL-RuL shows a slight selective cytotoxicity toward carcinoma HeLa cells over normal MRC-5 cells. MTT assay results and two-photon scanning cell imaging demonstrate that CHL-RuL exhibits obvious chemo-photodynamic dual action against HeLa cells.
Co-reporter:Lei Fu, Mei Pan, Yan-Hu Li, Hong-Bin Wu, Hai-Ping Wang, Cheng Yan, Kang Li, Shi-Chao Wei, Zi Wang and Cheng-Yong Su
Journal of Materials Chemistry A 2012 - vol. 22(Issue 42) pp:NaN22500-22500
Publication Date(Web):2012/09/04
DOI:10.1039/C2JM34992B
A novel butterfly-like Ir(III) complex is designed, synthesized, and characterized for highly efficient yellow phosphorescent polymer-based light-emitting diodes (PLEDs). The device shows a maximum external quantum efficiency of 19.2%, luminance efficiency of 40 cd A−1 and Commission International de L'Eclairage (CIE) color coordinates of (0.49, 0.50) at J = 1.2 mA cm−2.
Co-reporter:Cheng Yan, Kang Li, Shi-Chao Wei, Hai-Ping Wang, Lei Fu, Mei Pan and Cheng-Yong Su
Journal of Materials Chemistry A 2012 - vol. 22(Issue 19) pp:NaN9852-9852
Publication Date(Web):2012/04/13
DOI:10.1039/C2JM00001F
In this paper, we report the design of a new functionalized tripodal ligand triCB-NTB (4,4′,4′′-(2,2′,2′′-nitrilotris(methylene)tris(1H-benzo[d]imidazole-2,1-diyl)tris(methylene))tribenzoic acid) and its assembly of Eu(III) homometallic or Zn(II)-Eu(III) heterometallic lanthanide-based metal–organic frameworks (MOFs). C3 symmetric Eu(III) center is achieved in the homometallic MOF, [Eu(triCB-NTB)]·DMAc·4H2O (1). The C3 axis of the three coordinated imino N atoms on the propeller-extended central triCB-NTB ligand coincides with the C3 axis that directs the three para-methyl carboxylic benzene arms on three surrounding ligands coordinating with the central Eu(III) simultaneously. Therefore, a (6, 3) pattern is formed in the framework with relatively large porosity. In the Zn-Eu heterometallic framework, [EuZn(triCB-NTB)(H2O)(Cl)2]·2DMAc·H2O (2), the N atoms on the triCB-NTB are coordinated with Zn(II) and the carboxylic O atoms are coordinated with Eu(III). A paddle-wheel linked Eu(III)2 cluster is formed and 1D loop-and-chain structure is obtained. Two ligands, two Zn(II) ions and two Eu(III)2 clusters constitute one box-like unit on the loop chain. Due to the non-inversion symmetry imposed on the central Eu(III) and the large polarizability of the ligand, both one photon (OP) luminescence based on the energy transfer from the ligand to Eu3+ and two photon (TP) luminescence based on the hypersensitive transition of the Eu3+ ions are observed in the two lanthanide-based MOFs. This satisfies the urgent needs of multi-mode luminescent lanthanide complex. Simultaneously, N2 gas and selective vapor adsorptions were also detected in the porous structure of complexes 1 and 2 due to their benzene-filled channels. The six-pointed-star like cavities in 1 can let the gas and vapor molecules go in and out smoothly subject to changes in the pressure, while the narrower and more irregular channels in 2 show irreversible adsorption behavior for benzene and cyclohexane vapor molecules in vacuum under room temperature.
Co-reporter:Ling Chen, Shao-Yun Yin, Mei Pan, Kai Wu, Hai-Ping Wang, Ya-Nan Fan and Cheng-Yong Su
Journal of Materials Chemistry A 2016 - vol. 4(Issue 29) pp:NaN6966-6966
Publication Date(Web):2016/06/27
DOI:10.1039/C6TC01308B
A highly fluorescent HPI-based excited-state intramolecular proton transfer (ESIPT) molecule is designed and adopted as a naked-eye colorimetric sensor to distinguish methanol, ethanol and isopropanol vapors. Amplified spontaneous emission was also observed for the C1-form single crystal of the molecule attributed to its intrinsic four-level energy states.
![1,3-Benzenedicarboxylic acid, 5-[(4-pyridinylcarbonyl)amino]-](/data/chemimg/102900/158520-85-5.png)
![1,3-Benzenedicarboxylic acid, 5-[(4-pyridinylcarbonyl)amino]-](/data/chemimg/102900/158520-85-5_b.png)
![[1,1'-Binaphthalene]-2,2'-diol,3,3'-dibromo-](http://img.cochemist.com/ccimg/149900/149821-06-7.png)
![[1,1'-Binaphthalene]-2,2'-diol,3,3'-dibromo-](http://img.cochemist.com/ccimg/149900/149821-06-7_b.png)
![[1,1'-Binaphthalene]-2,2'-diol,3,3'-dibromo-, (1S)-](http://img.cochemist.com/ccimg/119800/119707-74-3.png)
![[1,1'-Binaphthalene]-2,2'-diol,3,3'-dibromo-, (1S)-](http://img.cochemist.com/ccimg/119800/119707-74-3_b.png)
![Phenol, 2-[[bis(2-pyridinylmethyl)amino]methyl]-](http://img.cochemist.com/ccimg/115300/115289-04-8.png)
![Phenol, 2-[[bis(2-pyridinylmethyl)amino]methyl]-](http://img.cochemist.com/ccimg/115300/115289-04-8_b.png)
![[1,1'-Binaphthalene]-2,2'-diol,3,3'-dibromo-, (1R)-](http://img.cochemist.com/ccimg/111800/111795-43-8.png)
![[1,1'-Binaphthalene]-2,2'-diol,3,3'-dibromo-, (1R)-](http://img.cochemist.com/ccimg/111800/111795-43-8_b.png)
![Acetamide,2-chloro-N-[(1S)-1-phenylethyl]-](http://img.cochemist.com/ccimg/36300/36293-01-3.png)
![Acetamide,2-chloro-N-[(1S)-1-phenylethyl]-](http://img.cochemist.com/ccimg/36300/36293-01-3_b.png)
