Wei-Qiu Kan

Huaiyin Normal University, Peping, Beijing, China

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Publications (50)132.35 Total impact

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    ABSTRACT: A new family of polyoxovanadates-based inorganic-organic hybrid compounds with multiple Lewis basic sites, namely, [Zn5(Htrb)2(H2O)2(V5O15)2]·11H2O (1), [Zn2(Htrb)(HV5O15)]·6H2O (2), [Co3(Htrb)(H2O)4(V3O9)2]·4H2O (3), and [Ag3(Htrb)(H4V5O16)]·H2O (4), have been hydrothermal synthesized by using a multidentate N-containing hexakis(1,2,4-triazol-ylmethy1)benzene (Htrb). In 1, [V4O12]4- and [V6O18]6- rings are linked by Zn(II) ions into a two-dimensional (2D) inorganic layer, which are pillared by Htrb ligands to afford a unique three-dimensional (3D) framework. In 2, rod-shaped [H2V10O30]8- clusters are bridged by Zn(II) ions to generate one-dimensional inorganic hybrid motifs, which are joined by Htrb ligands to yield a 3D framework. In 3, Co(II) ions bridge [V6O18]6- rings to result in a 2D inorganic sheet, and the adjacent sheets are extended by the Htrb ligands into a 3D motif. In 4, adjacent 12-membered vanadium rings, composed of [VO4] tetrahedra and [VO5] trigonal bipyramids, form a unique 2D inorganic layer via sharing corner O atoms. Strikingly, neighboring layers are further extended by Htrb ligands and Ag(I) ions into a 3D framework. Moreover, photocatalytic degradation of compounds 1, 3, and 4 toward methylene blue (MB) and methyl orange (MO) was studied under UV light irradiation. A possible photocatalytic mechanism was also speculated by introducing t-butyl alcohol as a widely used ·OH scavenger. In addition, luminescent selective and sensitive sensing of Cr3+ compared with other metal ions such as Zn2+, Al3+, Co2+, K+, Na+, and Pb2+ were investigated by using 1 and 4. Finally, their electrochemical behaviors were also studied.
    No preview · Article · Dec 2015 · Crystal Growth & Design
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    Wei-Qiu Kan · Shi-Zheng Wen · Yu-He Kan · Hua-You Hu · Lin Yang · Dan Li
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    ABSTRACT: A novel coordination polymer based on the multidentate N-donor ligand 1-((1H-1,2,4-triazol-1-yl)methyl)-3,5-bis(3-pyridyl)-1,2,4-triazole (3,3′-tmbpt) and 1,2,4,5-benzenetetracarboxylate anion (btec), namely, [Zn5(3,3′-tmbpt)(btec)2(OH)2] (1), has been synthesized hydrothermally. Compound 1 displays a rare 3D (3,4,11)-connected framework based on a [Zn5(OH)2]8 + cluster. The optical band gap and photoluminescent property of compound 1 have been studied.
    Full-text · Article · Sep 2015 · Inorganic Chemistry Communications
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    Wei-Qiu Kan · Shi-Zheng Wen · Hua-You Hu · Yu-He Kan
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    ABSTRACT: Four Cd(II)- and Cu(II)-containing coordination polymers (CPs) based on a multidentate N-donor ligand and varied dicarboxylate anions, [Cd(3,3′-tmbpt)(p-bdc)]·2.5H2O (1), [Cd(3,3′-tmbpt)(m-bdc)]·2H2O (2), [Cu(3,3′-tmbpt)(m-bdc)]·H2O (3), and [Cu(3,3′-tmbpt)(p-bdc)]·2H2O (4), where 3,3′-tmbpt = 1 − ((1H-1,2,4-triazol-1-yl)methyl)-3,5-bis(3-pyridyl)-1,2,4-triazole, p-H2bdc = 1,4-benzenedicarboxylic acid, and m-H2bdc = 1,3-benzenedicarboxylic acid, have been prepared hydrothermally. The structures of the compounds were determined by single-crystal X-ray diffraction analyses and further characterized by infrared spectra and elemental analyses. Compound 1 exhibits a 3-D twofold interpenetrating framework with a 65·8 CdSO4 topology. Compound 2 is a 2-D layer containing meso-helical chains with a 44·62 sql topology. Compound 3 shows a 1-D → 3-D interdigitated architecture while 4 displays a 2-D → 3-D interdigitated architecture. The structural differences of the compounds indicate that the dicarboxylate anions and the central metal ions play important roles in the resulting structures of CPs. Optical band gaps and solid-state photoluminescent properties have also been studied.
    Full-text · Article · May 2015 · Journal of Coordination Chemistry
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    Chao Wang · Huayou Hu · Juanfang Xu · Wei-Qiu Kan
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    ABSTRACT: A one-pot method for synthesizing multi-substituted indolizines from α-halide carbonyl compounds, pyridines and electron deficient alkenes was developed. Sub-equivalent amount of potassium dichromate was used as an oxidant under base free conditions. The transformation developed should be of economic efficiency.
    Full-text · Article · May 2015 · RSC Advances
  • Shi-Zheng Wen · Wei-Qiu Kan · Hua-You Hu · Yu-He Kan
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    ABSTRACT: A novel coordination polymer, namely, [Cd7(4,4′-tmbpt)3(d-cam)6(OH)2]·8.25H2O (1), where 4,4′-tmbpt = 1-((1H-1,2,4-triazol-1-yl)methyl)-3,5-bis(4-pyridyl)-1,2,4-triazole, and d-H2cam = d-camphoric acid, has been synthesized under hydrothermal condition. Compound 1 exhibits a three-dimensional homochiral (3,8,9)-connected framework, which is a rare example of coordination polymer with homochiral highly connected structure based on the chiral source of d-H2cam. The structure of the compound was determined by single-crystal X-ray diffraction analysis and further characterized by infrared spectrum (IR), elemental analysis and UV–Vis spectrum. Moreover, the optical band gap and photoluminescent property of the compound have been investigated.
    No preview · Article · Feb 2015 · Inorganic Chemistry Communications
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    ABSTRACT: A series of coordination polymers constructed from tripodal N-donor ligands and polycarboxylate anions, namely, [Ag6(3,4 '-tmbpt)(btc)2]center dot 2H(2)O (1), [Ag-2(3,4 '-tmbpt)(H(2)btec).H2O-120 (2), [Ag-2(4,4 '-tmbpt)(Hbtc).H2O (3), [Cd-3(4,4 '-tmbpt)(btc)(2)(H2O)6]center dot 7H(2)O (4), [Co(4,4'-tmbpt)(btec)0.5(F120)1 (5) and [Ni(4,41-tmbpt)(btec)0.5 (H2O)] (6), where 3,4 '-tmbpt = 1-((1H-1,2,4-triazol-1-yl)methyl)-3-(4-pyridy1)-5-(3-pyridy1)-1,2,4-triazole, 4,4 '-tmbpt = 1 -((1H-1,2,4-triazol-1-y1)methyl)-3,5-bis(4-pyridy1)-1,2,4-triazole, H(3)btc = 1,3,5-benzenetricarboxylic acid, and RIbtec = 1,2,4,5-benzenetetracarboxylic acid, have been hydrothermally prepared. Single crystal X-ray diffraction analyses indicate that compound 1 exhibits a 3D (3,4,6)-connected framework with (4.6(2))(2)(6.8(5))(2)(4.6(2),8(3).12) topology. Compound 2 has a 3D (3,4)-connected framework with (6(3))2(4(2).6(4))(4(2).6(3).8) topology. Compound 3 exhibits a 2D layer structure. Compound 4 shows a 3D 2-fold interpenetrating framework with (6.10(2)) topology. Compounds 5 and 6 exhibit similar 2D -> 3D polythreading architectures. These compounds have been characterized by infrared spectra (IR), elemental analyses and powder X-ray diffraction (PXRD) analyses. The effects of the organic anions on the structures of the compounds have been discussed. Moreover, the photoluminescent properties of the compounds have been investigated.
    Full-text · Article · Jan 2015 · Polyhedron
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    ABSTRACT: We report a new microporous negatively charged metal–organic framework (MOF), [(C2H5)2NH2]2[Mn6(L)(OH)2(H2O)6]·4DEF (1) (H12L = 5,5′,5′′,5′′′,5′′′′,5′′′′′-[1,2,3,4,5,6-phenylhexamethoxyl]hexaisophthalic acid and DEF = N,N′-diethylformamide), and its utilization as a platform for the highly selective adsorption and separation of organic dyes through an ion-exchange process. The dynamics of selective adsorption, separation and release of a series of organic dyes demonstrated that this exchange-based separation process is highly related to the sizes or charges of organic dyes, and this relationship can be controlled by the structural characteristics of MOF 1.
    Preview · Article · Dec 2014
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    ABSTRACT: Four polyoxometalate-based semiconductive coordination polymers, namely, [Cd3(2,3′-Htmbpt)2(2,3′-tmbpt)4(γ-Mo8O26)(β-Mo8O26)(H2O)4]·5H2O (1), [Co(2,3′-Htmbpt)2(β-Mo8O26)]·4H2O (2), [Ag(2,3′-Htmbpt)2(β-Mo8O26)]·H3O·4H2O (3), and [Cu(2,3′-tmbpt)(β-Mo8O26)]·H2O (4) (2,3′-tmbpt = 1-((1H-1,2,4-triazol-1-yl)methyl)-3-(3-pyridyl)-5-(2-pyridyl)-1,2,4-triazole) have been synthesized under hydrothermal conditions. Their structures have been characterized by single-crystal X-ray diffraction analyses, infrared spectra (IR), elemental analyses and powder X-ray diffraction (PXRD) analyses. Polymer 1 has a 3D (4,6)-connected framework with (5·64·8)(4·52·62·7)(42·54·66·7·82) topology. In polymer 2, the [β-Mo8O26]4− anions connect the Co(II) ions to form a chain, which is decorated by the 2,3′-Htmbpt ligands. The chains are extended by the hydrogen bonding interactions to generate a 3D supramolecular framework. Polymer 3 displays a discrete structure, which is linked by the hydrogen bonding interactions to form a chain. The chains span in two different directions, yielding a plywood-like structure. In polymer 4, the [β-Mo8O26]4− anions connect the Cu(II) ions to furnish a layer, which is further coordinated by the 2,3′-Htmbpt ligands. The layers are linked by the hydrogen bonding interactions to form a 3D supramolecular framework. The optical band gaps of 1-4 reveal that they are potential semiconductive materials. The luminescent spectra of polymers 1 and 3 indicate that they emit blue luminescence at room temperature. The photocatalytic investigation indicates that polymers 1-3 can promote the decomposition of methylene blue solution, while polymer 4 inhibits the decomposition process.
    Full-text · Article · Dec 2014 · Synthetic Metals
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    ABSTRACT: Three coordination polymers based on multidentate N-donor ligands and polycarboxylate anions, namely, [Co-3(4,4'-tmbpt)(4)(btc)(2)].9.5H(2)O (1), [Ag-4(4,4'-tmbpt)(btec)(H2O)(2)]center dot H2O (2) and [Zn(4,4'-tmbpt)(btec)(0.5)(H2O)]center dot 0.5H(2)O (3) (4,4'-tmbpt = 1-((1H-1,2,4-triazol-1-yl)methyl)-3,5-bis(4-pyridy1)-1,2,4-triazole, H(3)btc = 1,3,5-benzenetricarboxylic acid,000 and H(4)btec = 1,2,4,5-benzenetetracarboxylic acid) have been prepared under hydrothermal condition. Compound 1 displays a 3D (3,6,8)-connected framework with (4.6(2))(4(4).6(10).8)(4(14).6(12).8(2)) topology. Compound 2 is a 3D (4,5,8)-connected framework with (4(3).6(2).8)(4(3).6(5).8(2))(4(8).6(2))(4(10).6(10).8(8)) topology. Compound 3 exhibits a 2D -> 3D polythreading architecture. The photoluminescent spectra indicate that at room temperature, compounds 2 and 3 emit green and blue luminescence, respectively.
    Full-text · Article · Nov 2014 · Inorganic Chemistry Communications
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    ABSTRACT: Two coordination polymers [Cu(phen)(L)0.5(H2O)] (1) and [Ni2(phen)2(L)(H2O)0.5]·0.5H2O (2), where phen = 1,10-phenanthroline and H4L = 5,5′-(ethane-1,2-diyl)-bis(oxy)diisophthalic acid, have been synthesized under hydrothermal conditions. In complex 1, the L anions and the phen ligands connect the Cu(II) ions to form a layer. The phen ligands act as arms and thread into the adjacent layer, forming a 2D → 3D polythreaded architecture. In complex 2, the L anions and the phen ligands link the Ni(II) ions to form a layer. Further, the adjacent layers interdigitate each other through intermolecular π − π interactions to generate a 2D → 3D interdigitated architecture. Their structures have been determined by single-crystal X-ray diffraction analyses and further characterized by infrared spectra (IR) and elemental analyses. The thermal properties and optical band gaps of complexes 1 and 2 have also been investigated. Graphical Abstract Two interesting 2D → 3D polythreaded and interdigitated coordination polymers based on the flexible 5,5′ -(ethane-1,2-diyl)-bis(oxy)diisophthalic acid have been successfully synthesized, where the thermal properties and optical band gaps of the complexes have also been investigated.
    No preview · Article · Oct 2014 · Journal of Chemical Crystallography
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    Wei-Qiu Kan · Ji-Ming Xu · Yu-He Kan · Jiao Guo · Shi-Zheng Wen
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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.
    Full-text · Article · Feb 2014 · Journal of Coordination Chemistry
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    ABSTRACT: Templated by iodine molecules, the first example of an I2-containing In(III)-MOF, [In2(pydc)3(H2O)]·0.5I2·0.5H2O, has been prepared. It shows a rare single-crystal-to-single-crystal (SCSC) transformation upon removal the lattice iodine molecules.
    No preview · Article · Oct 2013 · CrystEngComm
  • Peng Du · Yan Yang · Jin Yang · Ying-Ying Liu · Wei-Qiu Kan · Jian-Fang Ma
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    ABSTRACT: Eight highly connected metal-organic frameworks (MOFs) based on flexible tricarboxylate ligands, namely, Na[Zn5(L)2(μ3-OH)5] (1), (HTEA)[Zn3(L)2(μ3-OH)]·0.25H2O (2), [Zn3(L)2(BIME)(H2O)2] (3), [Cd3(L)2(BIME)(H2O)2] (4), [Pb7(L)4(μ3-OH)2(H2O)2]·8H2O (5), [Zn4(L)2(BET)(μ4-O)] (6), [Zn2(HL)2(PBIB)]·2H2O (7), and [Zn3(L)2(PBIB)2]·4H2O (8) (H3L = (3,5-dicarboxylphenyl)-(4-(2′-carboxylphenyl)benzyl) ether, TEA = triethylamine, BIME = 1,2-bis(imidazol-1-yl)ethane, BET = 1,2-bis(1,2,4-triazole-1-yl)ethane, and PBIB = 1,4-bis(imidazol-1-ylmethyl)benzene) have been synthesized under hydrothermal conditions. Compound 1 exhibits a three-dimensional (3D) (3,12)-connected framework based on decanuclear [Zn10(μ3-OH)10(COO)12] units. Compound 2 displays a 3D (3,6)-connected framework based on trinuclear [Zn3(μ3-OH)(CO2)6] units. Compounds 3 and 4 display unusual 2-fold interpenetrated 3D (3,6)-connected frameworks with the same (42·6)2(44·62·88·10) topology. Compound 5 features a 3D tetranodal (3,3,4,8)-connected framework based on pentanuclear [Pb5(COO)8(μ3-OH)2(H2O)2] units. Compound 6 exhibits an unprecedented 2D (3,8)-connected network with (3·42)(46·57·68·73·8) topology based on tetranuclear [Zn4(μ4-O)(COO)6] units. Compound 7 reveals a wavy 2D sheet with (44·62) topology. Further, each sheet is interdigitated by two others in a parallel fashion to yield an unusual 2D → 3D interdigitated framework. Compound 8 displays a 3D rare trinodal (3,4,6)-connected framework with (3·4·5)2(32·103·11)(32·42·52·103·114·12·13) topology. These compounds have been characterized by IR spectra, UV-vis spectra, TGA, and powder XRD patterns. The optical band gaps and photoluminescent behaviors of 1-8 have been investigated in detail. In addition, surface photovoltage spectroscopies of compounds 1-4 indicate that these compounds possess positive surface photovoltage (SPV) responses in the range of 300-600 nm.
    No preview · Article · Sep 2013 · CrystEngComm
  • Zhe Zhang · Jian-Fang Ma · Ying-Ying Liu · Wei-Qiu Kan · Jin Yang
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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.
    No preview · Article · Aug 2013 · Crystal Growth & Design
  • 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.
    No preview · Article · Jun 2013 · CrystEngComm
  • Yan Yang · Peng Du · Jin Yang · Wei-Qiu Kan · Jian-Fang Ma
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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.
    No preview · Article · May 2013 · CrystEngComm
  • 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.
    No preview · Article · Apr 2013 · CrystEngComm
  • Ai-Ting Pu · Jin Yang · Wei-Qiu Kan · Yan Yang · Jian-Fang Ma
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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.
    No preview · Article · Feb 2013 · Polyhedron
  • Zhe Zhang · Jian-Fang Ma · Ying-Ying Liu · Wei-Qiu Kan · Jin Yang
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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.
    No preview · Article · Feb 2013 · CrystEngComm
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    Yuan-Chun He · Jin Yang · Wei-Qiu Kan · Jian-Fang Ma
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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.
    Preview · Article · Jan 2013 · CrystEngComm