Synthesis, Crystal Structure and Photoluminescent Property of Metal-Organic Frameworks with Mixed Carboxylate and Imidazole-Containing Ligands

Authors

  • Zhi Su,

    1. Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing, Jiangsu 210093, China
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  • Jian Fan,

    1. Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing, Jiangsu 210093, China
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  • Taka-aki Okamura,

    1. Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
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  • Weiyin Sun

    Corresponding author
    1. Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing, Jiangsu 210093, China
    • Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing, Jiangsu 210093, China, Tel.: 0086-025-83593485; Fax: 0086-025-83314502
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Abstract

Three new metal-organic frameworks (MOFs), namely [Zn(tib)(PDC)] (1), [Zn3(tib)2(CHDC)3]·8H2O (2) and [Zn3(tib)2(BTC)2]·4.95H2O (3) were synthesized by hydrothermal reactions of ZnCl2 with 1,3,5-tris(1-imidazolyl)benzene (tib) and different carboxylate ligands of 2,6-pyridinedicarboxylic acid (H2PDC), 1,4-cyclohexanedicarboxylic acid (H2CHDC) and 1,3,5-benzenetriacetic acid (H3BTC), respectively. The complexes were characterized by IR, thermogravimetric analysis, single crystal and powder X-ray diffractions. Complex 1 has a binuclear structure, in which one imidazole group of tib is free of coordination, while 2 has three-dimensional (3D) framework with the CHDC-Zn microcycles filled into the tib-Zn 3D net, and 3 is a 2-fold interpenetrating 3D framework with the interconnection of two one-dimensional (1D) chains formed by BTC-Zn and tib-Zn, respectively. The different structures of 13 are resulted from the distinct carboxylate ligands. In addition, complexes 13 show obvious emissions at room temperature in the solid state.

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