Wei-Qiu Kan

Huaiyin Normal University, Peping, Beijing, China

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Publications (24)89.86 Total impact

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    ABSTRACT: Five inorganic–organic hybrid compounds have been prepared under hydrothermal conditions and characterized by single-crystal X-ray diffraction analyses, infrared spectra, elemental analyses, powder X-ray diffraction, and thermogravimetric analyses. In 1, each 2,2-tmbpt ligand links two Cu(II) ions to generate a highly undulated chain. The chains are further bridged by [SiW12O40]4‐ anions to form a layer. Compound 2 exhibits a 3-D (3,4,5)-connected framework with large channels, in which [SiW12O40]4‐ anions are tetradentate linkages. In 3, each 2,4-tmbpt links three Cu(II) ions to form 2-D layers, which are further linked by [SiW12O40]4‐ to yield a 3-D (3,4)-connected framework. In 4, each 4,4-tmbpt connects three Cu(II) ions to generate 1-D double chains. In 5, [PW12O40]3‐ link Cu(II) ions to generate 1-D chains. Compounds 1‐5 exhibit photocatalytic activities for degradation of methylene blue and rhodamine B.
    Journal of Coordination Chemistry 01/2014; 67(2). · 1.80 Impact Factor
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    ABSTRACT: Ten new coordination polymers, [Zn2(Htrb)(L1)2]·8H2O (1), [Zn2(Htrb)(HL2)2(H2O)2]·4H2O (2), [Co2(Htrb)(HL2)2(H2O)2]·4H2O (3), [Cd2(Htrb)(HL2)2(H2O)2]·4H2O (4), [Cu3(Htrb)(L2)2(H2O)2]·8H2O (5), [Ag5(Htrb)(HL2)(L2)(H2O)2]·2H2O (6), [Ag6(Htrb)2(HL3)2(L4)]·2H3L3·6H2O (7), [Ag4(Htrb)2(H2L5)2] (8), [Ag6(Htrb)2(HL6)2(H2O)3]·2H2O (9), and [Ag2(Htrb)]·2NO3 (10), based on a hexadentate N-donor ligand hexakis(1,2,4-triazol-ylmethy1)benzene (Htrb) and different carboxylates, have been synthesized (H2L1 = 5-OH-1,3-benzenedicarboxylic acid, H3L2 = 1,3,5-benzenetricarboxylic acid, H3L3 = 1,2,4-benzenetricarboxylic acid, H2L4 = 2-CH2OH-1,4-benzenedicarboxylic acid, H4L5 = 3,3′,4,4′-benzophenone tetracarboxylate acid, and H4L6 = 4,4′-oxidiphthalic acid). Compounds 1–4 feature typical 2D binodal 4-connected networks with a (4·64·8)2(42·64) topology. Compound 5 exhibits a 3D (4,6)-connected (44·62)(44·610·8) framework. Compound 6 shows a 3D trinodal (6,8)-connected framework with a (34·44·52·65)2(34·412·54·68) topology. Compound 7 features an unusual 3D trinodal (4,6)-connected net with a (32·62·72)(3·4·5·62·8)2(32·42·52·64·72·83) topology. Compound 8 displays a 2D layer with a (3,4)-connected (4·62)2(42·62·82) topology. Compound 9 shows a uninodal 2D 4-connected network with a (44)(62) topology. Compound 10 reveals a 3D (4,8)-connected (46)2(412·612·84) net. The ligand effects on the complex structures were studied. Moreover, their luminescent emissions were studied at room temperature.
    Crystal Growth & Design 08/2013; 13(10):4338–4348. · 4.69 Impact Factor
  • Wei Wang, Jin Yang, Wei-Qiu Kan, Jian-Fang Ma
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    ABSTRACT: Three inorganic–organic hybrid materials based on octamolybdates, d10 metals, and multidentate N-donor ligands, namely, [Zn4(htpmb)2(θ-Mo8O26)(H2O)6.5]·0.5H2O (1), [Zn6(htpmb)2(γ-Mo8O26)2(SO4)(H2O)6]·6.5H2O (2), and [Cd2(htpmb)(γ-Mo8O26)(H2O)2]·4.5H2O (3), where htpmb = hexakis(3-(1,2,4-triazol-4-yl)phenoxy-methyl)benzene, have been synthesized under hydrothermal conditions. Compound 1 shows a 3D framework based on a rare [θ-Mo8O26]4− isomer with binodal (5,6)-connected (32·43·5·63·7)(32·44·54·62·73) topology. Compound 2 displays a 3D framework with pentanodal (4,5,6,6,7)-connected (32·4·5·62)(32·42·52·63·8)(34·42·52·64·72·8)(34·42·52·66·9)(34·43·5·68·75) topology. Compound 3 exhibits a 3D framework with pentanodal (3,4,4,6,6)-connected (3·6·7)(32·4·62·7)(34·42)(32·66·76·10)(33·4·63·74·84) topology. Their structures have been characterized by infrared spectra (IR), elemental analyses, powder X-ray diffraction (PXRD), thermogravimetric analysis, and optical band gaps. The luminescent properties and electrochemistry behaviors of compounds 1–3 have been studied. Moreover, the photocatalytic activities for methylene blue (MB) degradation of 1–3 under UV light irradiation have also been investigated in detail.
    CrystEngComm 06/2013; · 3.88 Impact Factor
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    ABSTRACT: A series of coordination polymers based on 3,5-dinitrosalicylic acid (H2sal) and nine flexible bis(triazole) ligands, namely, [Cu4(sal)4(L1)2(H2O)]·2H2O (1), [Cu4(sal)4(L2)2(H2O)] (2), [Cu2(sal)2(L3)(H2O)] (3), [Cu2(sal)2(L4)(H2O)] (4), [Cu5(sal)4(OH)2(L5)2(H2O)3]·H2O (5), [Cu(sal)(L6)] (6), [Cu2(sal)2(L7)] (7), [Cu(sal)(L8)]·0.5H2O (8), [Cd2(sal)2(L1)(H2O)2] (9), [Cd2(sal)2(L7)3] (10) and [Cd4(sal)4(L9)4] (11), where L1 = 1,2-bis(1,2,4-triazol-1-yl)ethane, L2 = 1,3-bis(1,2,4-triazol-1-yl)propane, L3 = 1,4-bis(1,2,4-triazol-1-yl)butane, L4 = 1,5-bis(1,2,4-triazol-1-yl)pentane, L5 = 1,5-bis(1,3,4-triazol-1-yl)pentane, L6 = 1,6-bis(1,2,4-triazol-1-yl)hexane, L7 = 1,10-bis(1,2,4-triazol-1-yl)decane, L8 = 1,4-bis((1H-1,2,4-triazol-1-yl)methyl)benzene and L9 = 1,1′-(2,2′-oxybis(ethane-2,1-diyl))bis(1H-1,2,4-triazole), have been synthesized and characterized by single crystal X-ray diffraction, elemental analyses, IR spectra, PXRD spectra and TG analysis. Compounds 1 and 4 possess one-dimensional (1D) double chains. Compounds 2, 3 and 5 show two-dimensional (2D) 44 networks. Compound 6 displays a three-dimensional (3D) uninodal eight-connected self-penetrating framework with the 42068 topology. Compound 7 reveals a 2D 2-fold interpenetrating 44-sql network. Compounds 8 and 9 display 2D undulated layers. Compound 10 shows a 1D chain. Compound 11 reveals a discrete tetranuclear cluster. The UV-vis spectra and optical energy gap of 1–11 have also been investigated in detail.
    CrystEngComm 05/2013; 15(21):4357-4371. · 3.88 Impact Factor
  • Wei Wang, Wei-Qiu Kan, Jin Yang, Jian-Fang Ma
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    ABSTRACT: Seven new coordination polymers based on d10 metals and multidentate N-donor ligands, namely [Na0.4Cd4(htpmb)(L1)3.2(Cl)2(H2O)2.4]·0.8H2L1·1.6H2O (1), [Cd4(htpmb)(L1)3(OH)2(H2O)2]·3H2O (2), [Zn2(htpmb)(L1)2]·H2L1·H2O (3), [Zn2(htpmb)(L1)2]·3H2O (4), [Zn2(htpmb)(HL2)4] (5), [Zn2(htpmb)(L3)4] (6), and [Cd4(htpmb)(L4)2(OH)2(H2O)3]·8H2O (7), where htpmb = hexakis(3-(1,3,4-triazol-1-yl)phenoxy-methyl)benzene, H2L1 = 1,4-benzenedicarboxylic acid, H2L2 = 2-hydroxy-benzoic acid, HL3 = benzoic acid and H3L4 = 5-hydroxy-1,3-benzenedicarboxylic acid, have been synthesized under hydrothermal conditions. Compounds 1 and 2 display the same 3D framework with new binodal 6-connected (45·55·65)(46·69) topology based on dinuclear Cd(II) units. Compounds 3 and 4 show identical 3D 2-fold interpenetrating frameworks with rare binodal 4-connected (4·64·8)(42·62·82) topology. Compounds 5 and 6 reveal a similar 1D chain structure. Compound 7 exhibits a 1D double chain structure. The complexes were structurally characterized by single-crystal X-ray diffraction analyses, elemental analyses, powder X-ray diffraction (PXRD), ultraviolet-visible absorption spectra (UV-vis), and infrared spectra (IR). The influences of coordination modes of the htpmb, and pH values on the structures of the coordination polymers have been discussed. The effects of central metals, carboxylate anions, and N-donor ligand on the final topologies have been discussed. The luminescent properties of the seven compounds have also been investigated in detail.
    CrystEngComm 04/2013; 15(19):3824-3834. · 3.88 Impact Factor
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    ABSTRACT: Ten new coordination polymers, namely, [Cd(L)(pbib)0.5] (1), [Ni(L)(pbib)]·2H2O (2), [Cd2(L)2(pytp)2]·H2O (3), [Cd(L)(tbpy)] (4), [Ni(L)(pytp)] (5), [Ni(L)(tbpy)]·0.25H2O (6), [Cd(L)(biim-6)0.5] (7), [Cd(L)(phen)] (8), [Cd3(L)3(H2O)]·H2O (9), and [Cd3(L)3(biim-4)0.5]·6H2O (10), where biim-4 = 1,1′-(1,4-butanediyl)bis(imidazole), biim-6 = 1,1′-(1,6-hexanedidyl)bis(imidazole), pbib = 1,4-bis(imidazol-1-ylmethyl)benzene, phen = 1,10-phenanthroline, pytp = 2-(6′-(pyridin-2″-yl)-4′-p-tolylpyridin-2′-yl)pyridine, tbpy = 2-(4′-(4″-tert-butylphenyl)-6′-(pyridin-2″-yl)pyridin-2′-yl)pyridine and H2L = 3-carboxy-1-(4′-(2″-carboxy)biphenylmethyl)-2-oxidopyridinium, have been synthesized under hydrothermal conditions. Their structures have been determined by single-crystal X-ray diffraction analyses and further characterized by infrared spectra (IR), elemental analyses, powder X-ray diffraction (PXRD) and thermogravimetric (TG) analyses. Compounds 1 and 2 show layer structures. Neighboring layers are further linked by π–π stacking interactions to form 3D supramolecular architectures. Compound 3 consists of two crystallographically different dimers, which are further linked by π–π and hydrogen-bonding interactions into a 2D supramolecular architecture. Compounds 4–6 feature chain structures. In 4, neighboring chains are stacked by π–π interactions to result in a 2D supramolecular architecture. In 5, the adjacent chains are linked by π–π interactions to yield a 3D supramolecular architecture. In 6, neighboring chains are further linked by hydrogen-bonding interactions into a 3D supramolecular architecture. Compound 7 exhibits a 2D 63-hcb network. Neighboring networks are further extended by π–π stacking interactions into a 3D supramolecular architecture. Compound 8 displays a (4,4) sheet. Compound 9 reveals a 2D (4,4) network. Compound 10 shows a 3D 5-connected framework with (46·64) topology. The effects of the L anions and the N-donor ligands on the structures of the coordination polymers have been discussed. In addition, the luminescent properties of 1, 3, 4 and 7–10 have also been investigated in details.
    Polyhedron 02/2013; 50(1):556–570. · 2.05 Impact Factor
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    ABSTRACT: A series of new coordination polymers, namely, [Zn2(Htrb)0.5(L1)(SO4)]·H2O (1), [Zn1.5(Htrb)0.5(L2)0.5(SO4)]·5H2O (2), [Zn3(Htrb)(SO4)3(H2O)3]·H2O (3), [Zn(Htrb)0.5(L1)]·3.5H2O (4), [Cd(Htrb)0.5(L1)(H2O)]·2.5H2O (5), [Co(Htrb)0.5(L1)(H2O)]·2H2O (6), and [Cu2(Htrb)0.5(L1)2(H2O)]·1.5H2O (7), where Htrb = hexakis(1,2,4-triazol-ylmethy1)benzene, H2L1 = 1,3-benzenedicarboxylic acid and H2L2 = fumaric acid, have been synthesized under hydrothermal conditions. The structures of the seven compounds have been determined by single-crystal X-ray diffraction analyses and further characterized by infrared spectra (IR), elemental analyses, and powder X-ray diffraction (PXRD). Compound 1 displays a 3D (4,8)-connected net with the rare (32·42·52)(36·48·510·64) topology. Compound 2 shows a typical 3D (4,6)-connected (44·62)(44·610·8) net. Compound 3 furnishes an unusual 3D (3,5,6)-connected net with (42)2(63)(42·68)3(42·86·103)2 topology. Compounds 4–6 exhibit similar 2D layer structures with (4,4)-connected (4·64·8)(42·64) topology. Compound 7 possesses a 3D 2-fold interpenetrating (3,4,6)-connected net with (4·62)(8·65)(42·68·83·102) topology. The effects of the Htrb ligand and anions on the structures of the coordination polymers have been discussed. In addition, photoluminescent properties of the compounds have also been investigated in detail.
    CrystEngComm 02/2013; 15(10):2009-2018. · 3.88 Impact Factor
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    ABSTRACT: A rare example of an ideal rhombic dodecahedron (rdo), MOP-1, has been successfully synthesized from six dinuclear paddlewheel units and eight flexible triangular carboxylate ligands, which shows highly efficient adsorption of dyes in an aqueous solution.
    CrystEngComm 01/2013; 15(5):848-851. · 3.88 Impact Factor
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    ABSTRACT: Series of inorganic-organic hybrid materials based on octamolybdates, silver ions, and multidentate N-donor ligands, namely, [Ag(2)(2,3'-tmbpt)(β-Mo(8)O(26))(0.5)] (1), [Ag(2)(2,4'-tmbpt)(2)(α-Mo(8)O(26))(0.5)(H(2)O)(0.5)]·2H(2)O (2), [Ag(3)(3,3'-tmbpt)(2)(α-H(2)Mo(8)O(26))(0.5)(β-Mo(8)O(26))(0.5)]·3.5H(2)O (3), [Ag(2)(3,3'-tmbpt)(ε-Mo(8)O(26))(0.5)]·1.75H(2)O (4), [Ag(2)(3,4'-tmbpt)(2)(β-Mo(8)O(26))(0.5)]·0.5H(2)O (5), and [Ag(3,4'-Htmbpt)(β-Mo(8)O(26))(0.5)] (6), where 2,3'-tmbpt = 1-((1H-1,2,4-triazol-1-yl)methyl)-3-(3-pyridyl)-5-(2-pyridyl)-1,2,4-triazole), 2,4'-tmbpt = 1-((1H-1,2,4-triazol-1-yl)methyl)-3-(4-pyridyl)-5-(2-pyridyl)-1,2,4-triazole), 3,3'-tmbpt = 1-((1H-1,2,4-triazol-1-yl)methyl)-3,5-bis(3-pyridyl)-1,2,4-triazole, and 3,4'-tmbpt = 1-((1H-1,2,4-triazol-1-yl)methyl)-3-(4-pyridyl)-5-(3-pyridyl)-1,2,4-triazole) have been synthesized under hydrothermal conditions. Compound 1 displays a rare 3D (3,4,8)-connected net with (4·8(2))(4(2)·8(4))(4(3)·8(20)·10(5)) topology. Compound 2 shows a rare 3D (4,6)-connected self-catenated framework with (6(4)·8(2))(4(2)·6(3)·8(2))(4(2)·6(8)·8(4)·10) topology. Compound 3 is a scarce 3D framework based on two different kinds of [Mo(8)O(26)](4-) isomers. Compound 4 exhibits a 3D framework constructed by silver-organic sheets and the rare [ε-Mo(8)O(26)](4-) anions. Compound 5 shows an interesting 1D → 2D polythreaded structure. Compound 6 displays a 2D layer structure, which is further linked by the N-H···O hydrogen bonds to form a 3D supramolecular architecture. Their structures have been further characterized by infrared spectra (IR), elemental analyses, powder X-ray diffraction (PXRD), electrochemistry and photoluminesce. Moreover, the photocatalytic activities for degradation of organic pollutant have been investigated for compounds 3-6.
    Inorganic Chemistry 10/2012; · 4.59 Impact Factor
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    ABSTRACT: A series of coordination polymers, namely, [Zn(2,3′-tmbpt)(o-bdc)(H2O)] (1), [Zn(2,3′-tmbpt)(m-bdc)] (2), [Zn(2,3′-tmbpt)(p-bdc)]·H2O (3), [Zn2(2,3′-tmbpt)(btc)(OH)]·0.5H2O (4), [Zn(2,3′-tmbpt)(btec)0.5]·2H2O (5), [Zn(3,3′-tmbpt)(o-bdc)]·H2O (6), [Zn(3,3′-tmbpt)(m-bdc)(H2O)]·H2O (7), and [Zn2(3,3′-tmbpt)(btc)(OH)(H2O)] (8), where 2,3′-tmbpt = 1-((1H-1,2,4-triazol-1-yl)methyl)-3-(3-pyridyl)-5-(2-pyridyl)-1,2,4-triazole, 3,3′-tmbpt = 1-((1H-1,2,4-triazol-1-yl)methyl)-3,5-bis(3-pyridyl)-1,2,4-triazole, o-H2bdc = 1,2-benzenedicarboxylic acid, m-H2bdc = 1,3-benzenedicarboxylic acid, p-H2bdc = 1,4-benzenedicarboxylic acid, H3btc = 1,3,5-benzenetricarboxylic acid, and H4btec = 1,2,4,5-benzenetetracarboxylic acid, have been synthesized under hydrothermal conditions. The structures of 1–8 have been determined by single-crystal X-ray diffraction analyses and were further characterized by infrared spectroscopy (IR), elemental analyses and powder X-ray diffraction (PXRD) analyses. Compounds 1 and 6 display 1D chain structures. Compound 2 shows a 3D 2-fold interpenetrating CdSO4 framework. Compound 3 reveals a 2D 2-fold interpenetrating square layer (sql) structure. Compound 4 exhibits a 3D 2-fold interpenetrating framework with (63)(69·8) topology. Compound 5 shows a non-interpenetrating 3D framework with (83)(85·10) topology. Compound 7 has a 2D layer structure. Compound 8 displays a 3D 2-fold interpenetrating framework with (4·62)(42·68·85) topology. The structural discrepancies of compounds 1–8 imply that the organic anions play an important role in the formation of the resultant structures of the coordination polymers. The luminescent properties of compounds 1–8 have also been investigated.
    CrystEngComm 09/2012; 14(20):6934-6945. · 3.88 Impact Factor
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    ABSTRACT: A series of coordination polymers, namely, [Cd(4,4′-tmbpt)(o-bdc)(H2O)]·5.25H2O (1), [Cd(4,4′-tmbpt)(m-bdc)] (2), [Cd(4,4′-tmbpt)(5–OH–bdc)] (3), [Cd5Na2(4,4′-tmbpt)2(btc)4(H2O)3.5]·6.5H2O (4), [Cd3(4,4′-tmbpt)(btc)2(H2O)2]·H2O (5), [Zn(4,4′-tmbpt)(m-bdc)] (6), [Zn3(4,4′-tmbpt)2(p-bdc)3]·5.5H2O (7), and [Zn3(4,4′-tmbpt)(btc)2(H2O)2]·H2O (8), where 4,4′-tmbpt = 1-((1H-1,2,4-triazol-1-yl)methyl)-3,5-bis(4-pyridyl)-1,2,4-triazole, o-H2bdc = 1,2-benzenedicarboxylic acid, m-H2bdc = 1,3-benzenedicarboxylic acid, 5–OH–H2bdc = 5-hydroxy-1,3-benzenedicarboxylic acid, H3btc = 1,2,3-benzenetricarboxylic acid and p-H2bdc = 1,4-benzenedicarboxylic acid, have been synthesized under hydrothermal conditions. Their structures have been determined by single-crystal X-ray diffraction analyses and further characterized by infrared spectra (IR), elemental analyses and powder X-ray diffraction (PXRD) analyses. Compounds 1, 3 and 7 display different 2D → 3D interdigitated structures. Compound 2 shows a 3D 6-connected framework with (412·63) topology. Compound 4 reveals a 3D (3,4,8)-connected net based on hexanuclear units. Compounds 5 and 8 are isostructural and display 3D (3,9)-connected frameworks based on trinuclear units. Compound 6 exhibits an unusual 2D → 3D polythreaded framework. The structural discrepancies of compounds 1–8 indicate that the presence of the different organic anions play important roles in the formation of the final structures of the coordination polymers. The luminescent properties were also investigated for the compounds 1–8.
    CrystEngComm 08/2012; 14(19):6271-6281. · 3.88 Impact Factor
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    ABSTRACT: We describe an exceedingly rare example of solid-state single-crystal-to-single-crystal transformation from a 2D layer to a known 3D framework via lattice iodine release, which involves the formation of a new Cu-O ligand bond and a change in the metal coordination geometry.
    Chemical Communications 08/2012; 48(63):7859-61. · 6.38 Impact Factor
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    ABSTRACT: Seven new coordination polymers, namely, [Zn(L)(biim-4)]·3H2O (1), [Co(L)(biim-4)0.5] (2), [Zn(L)(btpy)]·1.75H2O·0.25EtOH (3), [Co(L)(btpy)] (4), [Cd(L)(phen)(H2O)]·H2O (5), [Cd3(L)2(OH)2(btb)(H2O)2] (6), and [Pb(L)(H2O)0.5] (7) (where H2L = 5-carboxy-1-(4′-carboxybenzyl)-2-oxidopyridinium, biim-4 = 1,1′-(1,4-butanediyl)bis (imidazole), btb = 1,2-bis(1,2,4-triazole-1-yl)ethane, phen = 1,10-phenathroline, and btpy = 2-(4-(4′-tert-butylphenyl)-6-(pyrindin-2-yl)pyri-din-2-yl)pyridine) have been synthesized under hydrothermal conditions. Compound 1 shows an unusual 2D → 2D interdigitated double layer formed by π–π interactions. Compound 2 reveals a 3D 6-connected framework with the (43·611·8) topology. Compounds 3 and 4 are isomorphous and exhibit the same 1D chain structures, which are further extended into a 2D supramolecular layer by hydrogen-bonding and π–π interactions. Compound 5 displays a 0D dimeric molecular structure, which is further linked by intermolecular hydrogen-bonding interactions to form a 2D supramolecular layer. Compound 6 shows a 2D layer structure. Intermolecular hydrogen-bonding interactions extended the 2D layers into a 3D supramolecular architecture. Compound 7 exhibits a 2D undulated (4,4) network. The complexes were structurally characterized by single-crystal X-ray diffraction analyses, thermogravimetric analyses (TGA), elemental analyses, powder X-ray diffraction (PXRD) and infrared spectra (IR). The coordination modes of the H2L ligand, the effects of the central metals and the N-donor ligands on the structures of coordination polymers have been discussed in detail. Furthermore, the luminescent properties of compounds 1, 3, 5 and 6 have also been studied.
    CrystEngComm 08/2012; 14(18):6004-6015. · 3.88 Impact Factor
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    ABSTRACT: Six inorganic-organic hybrid compounds, namely, [Cu(2)(2,4'-tmbpt)(2)(β-Mo(8)O(26))(H(2)O)(2)]·7H(2)O (1), [Cu(2,4'-tmbpt)(γ-Mo(8)O(26))(0.5)(H(2)O)]·H(2)O (2), [Co(2,4'-Htmbpt)(2)(γ-Mo(8)O(26))(H(2)O)(2)] (3), [Zn(2,4'-Htmbpt)(2)(γ-Mo(8)O(26))(H(2)O)(2)] (4), [Ni(2,4'-tmbpt)(α-Mo(8)O(26))(0.5)(H(2)O)]·2.5H(2)O (5) and [Ag(2,4'-Htmbpt)(β-Mo(8)O(26))(0.5)] (6), have been synthesized under hydrothermal conditions (2,4'-tmbpt = 1-((1H-1,2,4-triazol-1-yl)methyl)-3-(2-pyridyl)-5-(4-pyridyl)-1,2,4-triazole). The structures of compounds 1-6 have been determined by single-crystal X-ray diffraction analyses and characterized by infrared spectra (IR), elemental analyses, powder X-ray diffraction (PXRD) analyses and thermogravimetric analyses (TGA). Compound 1 shows a 3D (3,4)-connected framework constructed by the 2D Cu(II)-organic fragments and [β-Mo(8)O(26)](4-) anions. Compound 2 exhibits a 2D layer structure based on Cu(II)-organic chains and [γ-Mo(8)O(26)] chains. The layers are extended into a 3D supramolecular framework by hydrogen-bonding interactions. Compounds 3 and 4 are isostructural, and display 1D chain structures. The chains are further interlinked by hydrogen-bonding interactions to form 3D supramolecular architectures. Compound 5 shows a 3D framework based on the 2D Ni(II)-organic fragments and [α-Mo(8)O(26)](4-) anions. In compound 6, the 1D chains constructed by the Ag(I) ions, 2,4'-Htmbpt ligands and [β-Mo(8)O(26)](4-) anions are extended by hydrogen-bonding interactions into a 2D supramolecular layer. Each layer threads into the adjacent layers, yielding a 2D → 3D interdigitated structure. Moreover, the photoluminescent properties of 4 and 6, the optical band gaps of 1-6, and the photocatalytic properties of 1-6 have also been investigated.
    Dalton Transactions 08/2012; 41(36):11062-73. · 3.81 Impact Factor
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    ABSTRACT: Four novel highly connected metal–organic frameworks (MOFs) based on d10 metals and triangular ligands, namely, [Ag7(4,4′-tmbpt)(HL)2(L)(H2O)] (1), [NaCd3(4,4′-tmbpt)(L)2(OH)]·H2O (2), [Cd3(3,3′-tmbpt)2(L)2(H2O)2]·3.5H2O (3), and [Cd3(3,4′-tmbpt)2(L)2(H2O)]·1.5H2O (4) (H3L = 5-(4-carboxybenzyloxy)isophthalic acid, 4,4′-tmbpt = 1-((1H-1,2,4-triazol-1-yl)methyl)-3,5-bis(4-pyridyl)-1,2,4-triazole, 3,3′-tmbpt = 1-((1H-1,2,4-triazol-1-yl)methyl)-3,5-bis(3-pyridyl)-1,2,4-triazole, and 3,4′-tmbpt = 1-((1H-1,2,4-triazol-1-yl)methyl)-3-(3-pyridyl)-5-(4-pyridyl)-1,2,4-triazole) have been synthesized under hydrothermal conditions. Compound 1 features a three-dimensional (3D) (3,12)-connected net based on heptanuclear [Ag7(COO)7] units. Compound 2 displays a 3D (3,4,10)-connected net constructed by tetranuclear [NaCd3(μ3-OH)(COO)5]+ units. Compound 3 exhibits a 3D (3,4,8)-connected net based on binuclear [Cd2(COO)2] units. Compound 4 is a 3D binodal (3,9)-connected framework constructed by trinuclear [Cd3(COO)4] units. The diverse structures of compounds 1–4 indicate that the central metals and the N-donor ligands have significant effects on the final structures. The photoluminescent properties of compounds 1–4 have been studied in detail. Remarkably, compounds 1, 2, and 4 exhibit photocatalytic activities for degradation of dye under UV light irradiation and show good stabilities toward UV-light photocatalysis.
    Crystal Growth & Design 04/2012; 12(5):2288–2298. · 4.69 Impact Factor
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    ABSTRACT: Twelve new metal–organic frameworks (MOFs), namely, [Cd(L)(H2O)] (1), [Cd(L)2Na2]·H2O (2), [Cd(L)(phen)] (3), [Cd(L)(phen)]·2H2O (4), [Cd2(L)2(biim-2)]·H2O (5), [Cd(L)(biim-4)]·2H2O (6), [Co(L)(biim-4)]·H2O (7), [Cd(L)(btp)] (8), [Cd(L)(btb)] (9), [Cd(HL)(bth)0.5(H2O)]·H2O (10), [Co(HL)(btb)0.5]·H2O (11), and [Cd(L)(btbp)1.5]·4H2O (12), where phen = 1,10-phenathroline, biim-2 = 1,2-bis(imidazol-1′-yl)ethane, biim-4 = 1,1′-(1,4-butanediyl)bis(imidazole), btp = 1,3-bis(1,2,4-triazol-1-yl)propane, btb = 1,4-bis(1,2,4-triazol-1-yl)butane, bth = 1,6-bis(1,2,4-triazol-1-yl)hexane, btbp = 4,4′-bis(1,2,4-triazol-1-ylmethyl)biphenyl, and H2L = (3-carboxyl-phenyl)-(4-(2′-carboxyl-phenyl)-benzyl) ether, have been synthesized under hydrothermal conditions. Their structures have been determined by single-crystal X-ray diffraction analyses and further characterized by infrared spectra (IR), elemental analyses, powder X-ray diffraction (PXRD), and thermogravimetric (TG) analyses. Compound 1 features a two-dimensional (2D) layer, which is further stabilized by hydrogen bonds between the coordinated water molecules and adjacent carboxylate oxygen atoms. Compound 2 shows a 2D double layer with 36·46·53 topology. Compounds 3 and 4 exhibit similar one-dimensional (1D) double chains, which are further extended into 2D supramolecular sheets and three-dimensional (3D) supramolecular frameworks through π–π interactions between pyridyl rings and phenyl rings, respectively. Compound 5 furnishes a 1D double chain, which is further extended into a 2D supramolecular layer via two kinds of π–π interactions. Compounds 6 and 7 are isostructural and display the same 2D undulated sheets with 44·62 topology. Compound 8 possesses a 2D sheet structure. Compound 9 displays 3D (3,4)-connected frameworks with (4·102)(4·103·122) topology. Compounds 10 and 11 possess similar 1D infinite chains, which are further linked via π–π interactions to generate 2D supramolecular layers. Compound 12 possesses a 2D double layer, which is further extended into a 3D supramolecular architecture through hydrogen-bonding interactions. The structural and topological differences of the 12 compounds indicate that the L anion and N-donor ligands play important roles in the formation of the final framework structures. The thermal behaviors of compounds 1, 3–4, 8–10, and 12 and luminescent properties of 1–6, 8–10, and 12 have also been investigated in detail.
    Crystal Growth & Design 04/2012; 12(5):2397–2410. · 4.69 Impact Factor
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    ABSTRACT: A series of metal phosphonates, namely, [Cu(HL)(H2O)] (1), [Cu5(L)2(OH)4]·H2O (2), [Zn3(L)2(H2O)] (3), [Zn3(L)2(phen)2(H2O)2] (4), [Cd3(L)2(H2O)2] (5), [Cd2(L)(OH)(H2O)1.5] (6), and [Cd(HL)(phen)2]·2.5H2O (7), where H3L = 2′-carboxybiphenyl-4-ylmethylphosphonic acid, and phen = 1,10-phenanthroline, have been synthesized under hydrothermal conditions. Compound 1 exhibits a 2D layer structure with the 4-connected (42·64) topology. Compound 2 shows a 2D (3,10)-connected (32·6)(38·48·512·69·74·84) topology. Compound 3 displays a 2D (3,6)-connected (42·6)2(47·66·82) topology. Compound 4 is a 3D framework with the (42·6)2(47·66·82) topology. Compound 5 shows a 2D (4,6)-connected (44·62)(46)(410·65) topology. Compound 6 exhibits a 2D (3,6)-connected (42·6)(46·66·83) topology. Compound 7 displays a 0D closed loop structure. Furthermore, compounds 1, 5 and 7 are consolidated by the intramolecular O–HO hydrogen bonds. All the compounds have been characterized by infrared spectra (IR), elemental analyses, powder X-ray diffraction (PXRD) and thermogravimetric (TG) analyses. The luminescent properties of 3–7 have also been studied.
    CrystEngComm 02/2012; 14(6):2268-2277. · 3.88 Impact Factor
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    ABSTRACT: Two octamolybdate hybrid materials, namely, [Co2(HL)2(L)(H2Mo8O28)] (1) and [Co(L)2.5(Mo8O26)0.5]·H2O (2) (L = 1,1′-(1,4-butanediyl)bis(imidazole)) have been successfully synthesized at different pH values under hydrothermal conditions. Compound 1 displays a 3D (65·8) CdSO4-type framework. The most peculiar feature of 1 is that each window constructed by four Co(II) ions and two [H2Mo8O28]6− anions is threaded by two dangling HL+ ligands belonging to the framework itself. Compound 1 represents the first example of self-threading CdSO4-type framework. Compound 2 is a 3D 4-connected framework with the (64·82)(62·84) topology. The structural diversities of 1 and 2 reveal that the pH value of the reaction system plays a crucial role in the assembly of octamolybdate hybrid materials. In addition, the optical band gap and magnetic property of 1 have also been investigated.
    CrystEngComm 12/2011; 13(23):7037-7043. · 3.88 Impact Factor
  • Wei-Qiu Kan, Jian-Fang Ma, Bo Liu, Jin Yang
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    ABSTRACT: Ten new coordination polymers, namely, [Ni2(L)(H2O)3]·5H2O (1), [Ni2(L)(pbib)2(H2O)]·H2O (2), [Co2(L)(pbib)1.5]·2.5H2O (3), [Co2(L)(bbtz)1.5(H2O)5] (4), [Ni(L)0.5(biim-3)0.5(H2O)(CH3CH2OH)0.5]·2H2O (5), [Zn3(L)(biim-3)(OH)2] (6), [Ni(L)0.5(btp)(H2O)2]·H2O (7), [Zn2(L)(btp)2]·3H2O (8), [Co(L)0.5(btb)0.5(H2O)2]·1.5H2O (9), and [Zn(L)0.5(btb)]·0.5H2O (10), where pbib = 1,4-bis(imidazol-1-ylmethyl)benzene, bbtz = 1,4-bis(1H-1,2,4-triazol-1-ylmethyl)benzene, biim-3 = 1,3-bis(imidazol-1-yl)propane, btp = 1,3-bis(1,2,4-triazol-1-yl)propane, btb = 1,4-bis(1,2,4-triazol-1-yl)butane, and H4L = 5,5′-(ethane-1,2-diyl)-bis(oxy)diisophthalic acid, have been synthesized under hydrothermal conditions. Their structures have been determined by single-crystal X-ray diffraction analyses and further characterized by infrared spectra (IR), elemental analyses, powder X-ray diffraction (PXRD) and thermogravimetric (TG) analyses. Compound 1 features a 2-fold interpenetrating diamond-like framework. Compound 2 is a 3D 4-connected net with the (86)(73·82·9)(82·92·102)(82·94) topology. Compound 3 is a 3D 2-fold interpenetrating framework with the (5·62)(4·54·6)(42·58·85) topology. Compound 4 shows a rare 3D (4,7)-connected net with the (3·4·5·63)(32·42·5·613·73) topology. Compounds 5 and 6 exhibit 3D 2-fold interpenetrating frameworks with the (52·62·82)(42·82·92)(4·54·6) and (54·62) (58·66·7) topologies, respectively. Compounds 7 and 8 are 3D 3-fold interpenetrating frameworks with the 64·82 and (64·82)2(66)2 topologies, respectively. Compound 9 has a (3,4)-connected 2D layer structure with the (4·62)(42·62·82) topology. Compound 10 is a 3D 3-fold interpenetrating framework with the (62·8)(62·82·102) topology. The effects of the L anions, the N-donor ligands, and the metal ions on the structures of the coordination polymers have been discussed. The luminescent properties of 6, 8 and 10 and the optical band gaps of 1–10 have also been investigated in details.
    CrystEngComm 12/2011; 14(1):286-299. · 3.88 Impact Factor
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    ABSTRACT: Thirteen new metal–organic frameworks (MOFs), namely, [Zn2(L1)2(biim-4)(H2O)] (1), [Cd(HL1)2(biim-4)] (2), [Cd(HL2)2(biim-4)] (3), [Cd(HL3)2(biim-4)] (4), [Zn2(L4)2(biim-4)(H2O)] (5), [Cd(HL4)2(biim-4)] (6), [Zn2(L5)2(biim-4)(H2O)] (7), [Cd(HL5)2(biim-4)1.5]·H2O (8), [Zn2(L6)2(biim-4)(H2O)] (9), [Cd(HL6)2(biim-4)] (10), [Zn2(L7)2(biim-4)2]·H2O (11), [Cd2(L7)2(biim-4)2(H2O)]·H2O (12), and [Zn(HL8)(biim-4)]·0.5H2O (13), where H2L1 = salicylic acid, H2L2 = 3-methylsalicylic acid, H2L3 = 4-methylsalicylic acid, H2L4 = 4-chlorosalicylic acid, H2L5 = 5-chlorosalicylic acid, H2L6 = 5-bromosalicylic acid, H2L7 = 5-nitrosalicylic acid, H3L8 = 5-sulfosalicylic acid, and biim-4 = 1,1′-(1,4-butanediyl)bis(imidazole), have been synthesized under hydrothermal conditions. Compounds 1 and 5 are isomorphous, and show the same 3-connected 103-ths net. Compound 2 possesses a meso-helical chain structure. Compound 3 shows a zero-dimensional (0D) dimeric molecular structure, which is linked by π–π interactions into a two-dimensional (2D) supramolecular assembly. Compounds 4 and 6 exhibit similar one-dimensional (1D) chains, which are extended into different 2D supramolecular layers via C–H···O and C–H···Cl hydrogen-bonding interactions, respectively. Compound 9 is isomorphous with 7 and displays a typical 3D diamond framework. Compound 8 shows an unusual 2D → 3D polythreading array. Compound 10 furnishes a 2D supramolecular (44)-sql network formed by C–H···Br hydrogen-bonding interactions. Compounds 11 and 12 exhibit binodal (4,4)-connected 3D frameworks with (4.53.72)(4.52.83) and (42.62.82)(42.6.82.10) topologies, respectively. Compound 13 has a 3D 4-fold interpenetrating diamond framework. The TGA and luminescent properties of 1–13 have also been investigated in detail.
    Crystal Growth & Design 11/2011; 11(12):5540–5553. · 4.69 Impact Factor