Co-reporter:Ke-Li Cao, Yan Xia, Gui-Xian Wang, Yun-Long Feng
Inorganic Chemistry Communications 2015 Volume 53() pp:42-45
Publication Date(Web):March 2015
DOI:10.1016/j.inoche.2015.01.021
•One Ba-MOF based on a new pyridine carboxylic ligand (H2L) was obtained.•The MOF consists of left- and right-handed-helical chiral sheets to generate 3D framework.•The MOF exhibit an interesting fluorescent property for sensing of small molecules.Solvothermal reaction of Ba(NO3)2 with 5-(4-(2,6-di(pyridin-4-yl)pyridin-4-yl)phenoxy) isophthalic acid (H2L) afforded the first metal–organic framework based on L2 − ligand, [Ba2L2(H2O)3]n·5.5nH2O (1). Single crystal X-ray analysis shows that MOF 1 features a novel 3D supramolecular network built by different monochiral sheets. The luminescence intensity of this MOF can be modulated by different organic solvents.One new Ba-MOF was synthesized based on H2L ligand for sensing of small molecules. The MOF consisted of left- and right-handed-helical chiral sheets, and the adjacent sheets are further linked by inter-sheet hydrogen bonds to generate a 3D supramolecular achiral network.
Co-reporter:Yan Xia, Ke-Li Cao, Min-Min Han, Yun-Long Feng
Inorganic Chemistry Communications 2015 Volume 56() pp:76-78
Publication Date(Web):June 2015
DOI:10.1016/j.inoche.2015.03.049
•One Cd-MOF based on 5-(4-carboxybenzyloxy)isoph-thalic acid was obtained.•The Cd-MOF displays a 3D framework by π ⋯ π interactions between benzene rings and the parallel pyridine rings.•The Cd-MOF demonstrates unique selectivity for CH2Cl2. The luminescent intensity of Cd-MOF was selectively quenched by Ni2 + ions.Hydrothermal reaction of Cd2 + ions and 5-(4-carboxybenzyloxy)isoph-thalic acid (H3L) afforded a new 3D metal-organic framework (Cd-MOF), namely [Cd(HL)(2,2-bipy)]n·1.25nH2O. The luminescent properties of Cd-MOF dispersed in different solvents have been investigated systematically, demonstrating unique selectivity for the detection of CH2Cl2 via a fluorescence quenching mechanism. The luminescent intensity of Cd-MOF was selectively quenched by Ni2 + ions.One new Cd(II) metal organic framework (Cd-MOF), namely [Cd(HL)(2,2-bipy)]n·1.25nH2O was synthesized. The luminescent properties of the Cd-MOF dispersed in different solvents have been investigated systematically, demonstrating unique selectivity for the detection of CH2Cl2 via a fluorescence quenching mechanism. The luminescent intensity of Cd-MOF was selectively quenched by Ni2 + ions.
Co-reporter:Xiao Chen, Sha He, Feiyan Chen and Yunlong Feng
CrystEngComm 2014 vol. 16(Issue 37) pp:8706-8709
Publication Date(Web):18 Jul 2014
DOI:10.1039/C4CE01059K
Solvothermal reaction of a tetracarboxylic acid with Ba(NO3)2 afforded a barium–organic framework whose single crystal X-ray structure was characterized to have I2O1 connectivity and 1D channels 15.1 Å in diameter. The luminescence intensity of this MOF can be modulated by ion exchange.
Co-reporter:Xiao Chen, Ying Tong, Min-Min Han, Ke-Li Cao, Yun-Long Feng
Inorganic Chemistry Communications 2014 40() pp: 62-65
Publication Date(Web):
DOI:10.1016/j.inoche.2013.11.033
Co-reporter:Dan Zhao, Yun-long Feng, Yong-gang Wang, Yong-yao Xia
Electrochimica Acta 2013 Volume 88() pp:632-638
Publication Date(Web):15 January 2013
DOI:10.1016/j.electacta.2012.10.101
In the present work, various LiFePO4/carbon composites were prepared through a facile solvothermal route followed by heat treatment. These as-prepared LiFePO4/carbon composites, including LiFePO4/acetylene black (95:5 wt.%), LiFePO4/carbon nanotube (95:5 wt.%) and LiFePO4/graphene (95:5 wt.%), were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Their electrochemical performances were also investigated and compared in detail. The achieved results indicate that both particle-size and electrochemical performance of LiFePO4 much depend on the carbon supporter. When acetylene black and carbon nanotube were used as carbon supporter, the prepared LiFePO4 particles were agglomerate together to form large-size second particles which cannot well connect with carbon supporter. In the LiFePO4/graphene composite, ∼50 nm LiFePO4 particles uniformly loaded on the two-dimensional carbon supporter, and thus display much better rate ability. This result suggests that graphene should be a promising carbon supporter for LiFePO4.
Co-reporter:Yao-Kang Lv, Yun-Long Feng, Jian-Wen Cheng
Inorganic Chemistry Communications 2012 Volume 15() pp:130-135
Publication Date(Web):January 2012
DOI:10.1016/j.inoche.2011.10.008
Hydrothermal reactions of CeO2 with racemic tartaric acid (H2tar) at different temperature yielded two novel Cerium-Organic Framworks, [Ce2(tar)2(C2O4)(H2O)2]n·4nH2O (1) and [Ce2(tar)2(C2O4)(H2O)4]n (2). 1 displays an unprecedented fsx-4,5-P21/c topology, which contains hydrophilic channels constructed by triple helical chains along a axis; 2 exhibits a 2D layer framework with a binodal (3,4)-connected V2O5 network. Notably, in both 1 and 2, the oxalate ligands were in situ synthesized from H2tar.Two new Cerium-Organic Frameworks with unusual topologies were obtained. One structure contains hydrophilic channels constructed by triple helical chains along a axis.Highlights► Two novel Ce(III) frameworks were obtained through hydrothermal reactions. ► In both 1 and 2, the oxalate ligands were in situ synthesized from H2tar. ► 1 displays an unprecedented fsx-4,5-P21/c topology. ► 1 contains hydrophilic channels constructed by triple helical chains along a axis. ► 2 exhibits a 2D layer framework with a binodal (3,4)-connected V2O5 network.
Co-reporter:Xian-Rong Jiang, Xiao-Juan Wang, Yun-Long Feng
Inorganica Chimica Acta 2012 Volume 383() pp:38-45
Publication Date(Web):30 March 2012
DOI:10.1016/j.ica.2011.10.034
Two new Ni(II) complexes, [Ni2(2-CMSN)2(bpp)2(H2O)4]·1.5H2O (1), [Ni(2-CMSN)(4,4′-bipy)1.5(H2O)]·0.75H2O (2) (2-H2CMSN = 2-carboxymethylsulfanyl nicotinic acid, bpp = 1,3-bi(4-pyridyl)propane, 4,4′-bipy = 4,4′-bipyridine), have been solvothermally synthesized and characterized by single-crystal X-ray diffraction, elemental analyses, IR spectra and TG analyses. Single-crystal X-ray diffraction analysis reveals that they present two different structures. Complex 1 is 2D structure and further linked by hydrogen bonds into the final 3D 5-connected topology network. Complex 2 can be considered as a uninodal 4-connected twofold interpenetrating dia topology network. Photoluminescence studies reveal that complexes exhibit fluorescence quenching in the solid state at room temperature. The cyclic voltammograms of the complexes reveal that the processes of the redox are both irreversible.Graphical abstractBased on 2-carboxymethylsulfanyl nicotinic acid (2-H2CMSN), two new Ni(II) complexes: 5-connected topology network and 4-connected twofold interpenetrating dia topology network have been solvothermally synthesized and characterized. The luminescent and electrochemical properties have also been studied and discussed.Highlights► We have synthesized two Ni(II) complexes with 2-carboxymethylsulfanyl nicotinic acid. ► The complexes were structurally characterized by single-crystal X-ray diffraction. ► Complex 1 is linked by hydrogen bonds into a 3D 5-connected topology network. ► Complex 2 exhibits an uninodal 4-connected twofold interpenetrating dia topology network.
Co-reporter:Xiao-Juan Wang, Zhan-Guo Jiang, Jing Chen, Yun-Long Feng
Inorganica Chimica Acta 2011 Volume 373(Issue 1) pp:270-275
Publication Date(Web):15 July 2011
DOI:10.1016/j.ica.2011.02.053
Co-reporter:Yao-Kang Lv;Zhan-Guo Jiang;Jing Chen
Journal of Inorganic and Organometallic Polymers and Materials 2011 Volume 21( Issue 2) pp:223-228
Publication Date(Web):2011 June
DOI:10.1007/s10904-010-9449-3
Three new metal(II) complexes based on N-methylimidazole, [ML6]·(SH)2·(H2O)2, (M = Ni(II) (1), Co(II) (2), Cu(II) (3), L=N-methylimidazole), have been synthesized and characterized. The single crystal X-ray structural analyses show that complexes 1, 2, and 3 have isomorphous structures and crystallize in monoclinic system with space group P21/c. The complexes containing isolated SH− anions, which may come from the thermochemical sulfate reduction, are located in the gap with lattice water molecules and provide multiple intermolecular hydrogen bonds to form 2D layers. Topology analyses show a 2D hydrogen bond network, which can be regarded as an unprecedented trinodal (3,4,6)-connected topology with Schläfli symbol (3.4.53.6)2(3.4.5)2(32;54;64;82;93). Cyclic voltammetry and UV–vis spectra were studied.
Co-reporter:Mei-Xiang Jiang, Cai-Hong Zhan, Yun-Long Feng and You-Zhao Lan
Crystal Growth & Design 2010 Volume 10(Issue 1) pp:92
Publication Date(Web):December 16, 2009
DOI:10.1021/cg900416v
A series of three-dimensional coordination polymers [ML(H2O)2]n (M = Mn (1), Co (2), Zn (3), Cd (4); H2L = 5-carboxyl-1-carboxymethyl-3-oxidopyridimium) have been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction analyses, elemental analyses, IR spectra, and thermogravimetric analyses. Four complexes are isostructural and crystallize in the monoclinic system with space group P21/c. Their structures can be considered constructed from two-dimensional layers, which consist of left- and right-handed helical chains and further linked by L2− ligands into three-dimensional (3D) pillared-layer frameworks. From the topological point of view, the 3D nets are binodal with three- and six-connected nodes and exhibit rutile topology. The experimental magnetic susceptibilities of 1 and 2 are interpreted with the dimer law, yielding J and g values of 1.02 cm−1, 1.99 and −0.51 cm−1, 2.32, respectively. The exchange integrals (J) indicate weak ferromagnetic interactions between two Mn(II) ions in 1 and weak antiferromagnetic interactions between two Co(II) ions in 2. 3 and 4 exhibit intense luminescence in the solid state at room temperature.
Co-reporter:Yaokang Lü ; Dr. Yunlong Feng
Chinese Journal of Chemistry 2010 Volume 28( Issue 12) pp:2404-2410
Publication Date(Web):
DOI:10.1002/cjoc.201190012
Abstract
A new potassium lithium double salt of decavanadate, K4Li2[V10O28]·10H2O (1) has been synthesized and characterized. 1 crystallizes in the triclinic system, and features an unusual (6,8)-connected network with the K4O32 clusters, Li2O10 clusters and V10O28 clusters. The K4O32 clusters and Li2O10 clusters share an edge and a triangle plane to form an infinite rod-shaped chain. The chains are further interlinked by V10O28 clusters to generate the final 3D framework. UV-Vis spectrum, fluorescent spectrum and cyclic voltammetry curves have been studied.
Co-reporter:Yao-Kang Lv, Cai-Hong Zhan, Zhan-Guo Jiang, Yun-Long Feng
Inorganic Chemistry Communications 2010 Volume 13(Issue 3) pp:440-444
Publication Date(Web):March 2010
DOI:10.1016/j.inoche.2010.01.007
Co-reporter:CaiHong Zhan;WenXuan Cai;YinHua He
Science China Chemistry 2010 Volume 53( Issue 6) pp:1261-1265
Publication Date(Web):2010 June
DOI:10.1007/s11426-010-3178-x
A dicarboxylate ligand, 5-carboxyl-1-carboxymethyl-2-oxidopyridinium (H2L), was utilized to form four complexes with the general formula [M(HL)2(H2O)]·2H2O, M = CuII (1), ZnII (2), MnII (3), CdII (4). The crystals were isomorphous, belonging to the monoclinic C2/c space group. They were constructed from 1D chains and further linked by hydrogen bonds into a novel binodal (6,8)-connected 3D supramolecular network with twofold self-penetration. Photoluminescence studies revealed that complexes 2–4 displayed intense structure-related fluorescent emission bands.
Co-reporter:Cai-Hong Zhan;Xiao-Juan Wang;Zhan-Guo Jiang;Ling-Xian Chen
Structural Chemistry 2010 Volume 21( Issue 6) pp:1195-1201
Publication Date(Web):2010 December
DOI:10.1007/s11224-010-9659-x
p-Thioacetatebenzoic acid (H2L) and a combination of N-donor ligand of 4,4′-bipyridine (4,4′-bipy) with metal(II) ions give rise to three 3D supramolecules of general formula [M(HL)2(4,4′-bipy)2(H2O)2] · H2O, M = CoII (1), ZnII (2), NiII (3), which were characterized by crystallographic methods. The crystals are isostructural and belong to the triclinic \( P\bar{1} \) space group. The structure can be considered to construct from 1D chains and further linked by hydrogen bonds into the final 3D supramolecular networks. The electrochemical behavior of complexes 1 and 3 were studied by cyclic voltammetry, indicating that the electron transfers in the electrode reaction are irreversible. Meanwhile, complex 2 exhibits significantly red-shifted emission in solid state at room temperature.
Co-reporter:Cai-Hong Zhan, Mei-Xiang Jiang, Yun-Long Feng, Yin-Hua He
Polyhedron 2010 29(11) pp: 2250-2257
Publication Date(Web):
DOI:10.1016/j.poly.2010.04.025
Co-reporter:Mei-Xiang Jiang, Yun-Long Feng, Yin-Hua He, Hong Su
Inorganica Chimica Acta 2009 Volume 362(Issue 8) pp:2856-2860
Publication Date(Web):1 June 2009
DOI:10.1016/j.ica.2009.01.005
Five new lanthanide complexes Ln(HL)3(H2O)5 · 3H2O (H2L = 5-carboxy-1-carboxymethyl-2-oxidopyridinium, Ln = La (1), Sm (2), Eu (3),Tb (4), Dy (5)) have been synthesized and characterized by elemental analyses, FT-IR spectra and X-ray single crystal diffraction. All crystals are isostructural and crystallize in the triclinic space group P1¯. The metal center is nine-coordinated completely by two phenol O atoms, two chelating carboxylic O atoms from three HL ligands and five water molecules with a distorted tri-capped trigonal prismatic geometry. Photoluminescence studies revealed that complexes 2–4 exhibit strong fluorescent emission bands in the solid state at room temperature. The transition intensity varies in the order of Tb3+ > Dy3+ > Eu3+ > Sm3+.Five new lanthanide complexes Ln(HL)3(H2O)5 · 3H2O (H2L = 5-carboxy-1-carboxymethyl-2-oxidopyridinium, Ln = La (1), Sm (2), Eu (3),Tb (4), Dy (5)) have been synthesized and characterized by elemental analyses, FT-IR spectra and X-ray single crystal diffraction. The photoluminescence properties were also studied.
Co-reporter:Yin-Hua He, You-Zhao Lan, Cai-Hong Zhan, Yun-Long Feng, Hong Su
Inorganica Chimica Acta 2009 Volume 362(Issue 6) pp:1952-1956
Publication Date(Web):20 April 2009
DOI:10.1016/j.ica.2008.09.031
Employing an unsymmetrical 6-hydroxynicotinic acid as a bridging ligand, we have prepared a new NLO-active two-dimensional cadmium coordination polymer [Cd8(nicO)8(phen)8 · (H2O)]n (1) (H2nicO = 6-hydroxynicotinic acid, phen = 1,10-phenanthroline) under hydrothermal condition. At room temperature, 1 shows strong fluorescent emission bands in the solid state and a SHG efficiency of about 8 times that of KDP (KH2PO4). On the basis of TG/DTA analyses, the structure is thermally stable up to 370 °C.The hydrothermal reaction of CdII, H2nicO and phen leads to the generation of a new NLO-active coordination polymer, [Cd8(nicO)8(phen)8 · (H2O)]n (1), with strong fluorescent emission bands in the solid state and a SHG efficiency of about eight times that of KDP (KH2PO4). (H2nicO = 6-hydroxynicotinic acid, phen = 1,10-phenanthroline).
Co-reporter:Jian-Ling Yin, Yun-Long Feng, You-Zhao Lan
Inorganica Chimica Acta 2009 Volume 362(Issue 10) pp:3769-3776
Publication Date(Web):1 August 2009
DOI:10.1016/j.ica.2009.04.037
A new flexible aromatic multithiocarboxylate ligand: 1,4-benzenebis(thioacetic acid) (H2L), was synthesized and introduced to construct three interesting metal–organic frameworks (MOFs) with the photoluminescent properties. Three MOFs were characterized by the elemental analysis, infrared (IR) spectrum, and single crystal X-ray diffraction. [Zn3L3(2,2′-bipy)2]n (1) is a two-dimensional (2D) layered architecture that consists of the linear trinuclear units of Zn atoms. [ZnL(2,2′-bipy)(H2O)]n·0.7nH2O (2) is a one-dimensional (1D) helical chain, which further forms a 2D structure with 30-membered ring with a size of 7.64 × 15.53 Å via O−H···O hydrogen bonds. [ZnL(phen)(H2O)]n·0.35nH2O (3) presents a 2D supramolecular network through the O−H···O interactions. Their thermal and photoluminescent properties in solid state were given.The hydrothermal reaction of Zn(II) salts, 1,4-benzenebis(thioacetic acid), and neutral N-based ligands lead to the generation of three new coordination polymers with strong luminescent properties in solid state.
Co-reporter:Xiao-Hong Geng, Yun-Long Feng, You-Zhao Lan
Inorganic Chemistry Communications 2009 Volume 12(Issue 6) pp:447-449
Publication Date(Web):June 2009
DOI:10.1016/j.inoche.2009.03.010
A novel cadmium coordination polymer [Cd2L2(bpp)2]n (1) (H2L = 1,3-adamantanediacetic acid and bpp = 1,3-di-4-pyridylpropane) was prepared under hydrothermal condition. The three-dimensional (3D) structure is built from the interlinking lamellars. The CdII ions are six- and seven-coordinated and linked by L2− ligands, which results in the right- and left-handed helical chains. The layers are stacked with each other via bpp to generate a 3D architecture. At room temperature, the complex 1 shows the strong fluorescent emission bands in the solid state.The hydrothermal reaction of CdII, H2L and bpp leads to the generation of a new helical coordination polymer, [Cd2L2(bpp)2]n (1). At room temperature, the complex shows strong fluorescent emission bands in the solid state (H2L = 1,3-adamantanediacetic acid, bpp = 1,3-di-4-pyridylpropane).
Co-reporter:Xiaohong Geng;Lichun Kong;Jufang Zheng;Hong Su
Chinese Journal of Chemistry 2009 Volume 27( Issue 12) pp:2335-2340
Publication Date(Web):
DOI:10.1002/cjoc.201090004
Abstract
Three new complexes constructed by 1-adamantaneacetic acid (HL), [Zn2L4]n(1), [MnL2(4,4′-bipy)(H2O)2]n· 2n(HL) (2) and MnL2(2,2'-bipy)(H2O)2 (3), have been hydrothermally synthesized. X-ray single crystal diffraction analyses reveal that both 1 and 2 are infinite 1D chains along b axis. 2 and 3 have an octahedral coordination and show the supramolecular structures which are formed on the basis of the connectivity of intermolecular hydrogen bonds. The deprotonated L− ligands coordinate the M(II) atoms with many coordination modes in the title complexes.
Co-reporter:Shuguang ZHANG
Chinese Journal of Chemistry 2009 Volume 27( Issue 5) pp:877-881
Publication Date(Web):
DOI:10.1002/cjoc.200990147
Abstract
Tetrazolic acid, CN4H, has similar acidity to carboxylic acid group, COOH. 1-(4-Hydroxyphenyl)-5-mercaptotetrazole (H2L) can act as a monodentate (S or N) or a bidentate (N, N or N, S) ligand, forming coordination compounds with metal ions. Four new M(II) complexes with HL− ligands, Co(HL)2(Py)2(H2O)2 (1), [Mn(HL)2(H2O)4]·2H2O (2), Mn(HL)2(Phen)2 (3), and [Zn(HL)2(Phen)2]·0.5H2O·1.5CH3OH (4) have been synthesized and structurally determined by X-ray structure analyses. Among these complexes, the M(II) centers are all six-coordinated in an octahedral coordination geometry, and HL− ligands bond to M(II) centers via nitrogen atoms in 1 and 2, while via sulfur atoms in 3 and 4, respectively.
Co-reporter:Yin-Hua He, Yun-Long Feng, You-Zhao Lan and Yi-Hang Wen
Crystal Growth & Design 2008 Volume 8(Issue 10) pp:3586-3594
Publication Date(Web):August 20, 2008
DOI:10.1021/cg8000398
A new multicarboxylate ligand, 3,5-bis-oxyacetate-benzoic acid (H3BOABA), was designed and introduced to construct novel metal−organic framework materials with potential luminescent properties. Four complexes, Zn2(BOABA)(OH)·H2O (1), Zn4(BOABA)2(4,4′-bipy)2(OH)2·H2O·0.5CH3CH2OH (2), Cd3(BOABA)2(H2O)6·6H2O (3), and Cd4(BOABA)2(phen)4(OH)2·H2O (4), were synthesized hydrothermally and characterized. 1 features an unusual 5-connected 46.64 uninodal net with both the dinuclear Zn(II) unit and the BOABA ligand being the square pyramidal nodes. 2 presents an interesting three-dimensional (3,8)-connected network constructed from pillared undulate layers, which shows large one-dimensional channels with dimension of 11.97 × 13.82 Å along the a axis. The self-assembly between the Cd(II) ions and the BOABA ligand leads to a bilayer motif 3, whereas the presence of the auxiliary phen ligand results in a new compound 4 with monolayer construction based on tetranuclear [Cd4(OH)2]6+ clusters. Photoluminescence studies reveal that these four complexes exhibit strong fluorescent emission bands in the solid state at room temperature. The theoretic calculations show that four complexes are indirect band gap semiconductors and the fluorescent emission peaks could be attributed to the ligand−ligand charge transfer. The thermal stabilities of these complexes were also examined.
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