The 2-D double layer structures of indium–benzenemulticarboxylate coordination polymers with green fluorescence |
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Authors: | Zhengzhong Lin Lian Chen Chengyang Yue Chunfeng Yan Feilong Jiang Maochun Hong |
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Institution: | 1. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou 350002, China;2. College of Biology Engineering, Jimei University, Xiamen 361021, China |
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Abstract: | Two coordination polymers, In(btc)(2,2′-bpy)(H2O)]n · nH2O (1) and In2(btec)(2,2′-bpy)2Cl2]n (2) (H3btc = 1,3,5-benzenetricarboxylic acid, H4btec = 1,2,4,5-benzenetetracarboxylic acid, 2,2′-bpy = 2,2′-bipyridine), have been prepared under hydrothermal conditions. Single-crystal X-ray diffraction analyses reveal that compounds 1 and 2 consist of two-dimensional double layer structures with (3, 3) grids and (4, 2) grids, respectively. The grids along two different directions in 1 are of the opposite chirality, while the interactions of double-layer sheets in 2 create a three-dimensional supramolecular network with one-dimensional tunnels. The additional green luminescences for both 1 and 2 in the solid state at low temperature imply the red shift of emission energy in the compounds, which may derive from LMCT. Their X-ray powder diffractions and thermogravimetric analyses are also discussed. |
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