Blue fluorescence of three metal-organic zinc polymers containing tetrazinc units and asymmetric ligand of btc |
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| Authors: | Ling Xu Bing Liu Guo-Cong Guo Jin-Shun Huang |
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| Institution: | a State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, PR China
b Graduate School of Chinese Academy of Sciences, Beijing 100039, PR China |
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| Abstract: | Three new zinc coordination polymers Zn2(btc)2(H2O)2]n·nZn(H2O)6] (1), Zn3(btc)2(2,2′-bipy)2(H2O)3]n·2nH2O (2) and Zn3(btc)2(H2O)6]n·nH2O (3) (H3btc=1,2,4-benzenetricarboxylic acid, 2,2′-bipy=2,2′-bipyridine) were obtained by the diffusion method and their crystal structures were determined by single-crystal X-ray diffraction. Compounds 1-3 have the similar tetrametallic unit Zn4(btc)2] SBUs and these SBUs are further connected into stair-like structure, 2-D layer and 3-D framework for 1, 2 and 3, in which the btc3− ligands adopt μ3, μ4 and μ5 coordination modes, respectively. The title compounds show strong blue fluorescence, which may be assigned as π*→n transition of the ligand mixed with the ligand-to-metal change transfer (LMCT), indicating the fluorescence, indicates the title compounds may be good candidates for blue-light photoactive materials. |
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| Keywords: | Crystal structure Fluorescence SBU Tetrazinc units Zinc coordination polymers |
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