Hydrothermal Synthesis and Crystal Structure of a Keggin Polyoxometalate [Co^Ⅱ(2,2′-bipy)2(H2O)]2[SiW^Ⅵ12O40]·2H2O |
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作者姓名: | 朱美平 陈建新 兰婷燕 李爱科 张力 林欣蓉 |
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作者单位: | College;Chemistry;Materials;Science;Fujian;Normal;University;State;Laboratory;Structural;Institute;Research;Structure;Matter;Chinese;Academy;Sciences; |
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基金项目: | Supported by the Natural Science Foundation of Fujian Province (2007J0216, U0750004);;the Ministry of Education of China (No. 208066);;the Education Department of Fujian Province (JA07029);;the State Key Laboratory of Structural Chemistry (No. 20080053) |
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摘 要: | A Keggin-type tungstosilicate compound [Co^Ⅱ(2,2′-bipy)2(H2O)]2[SiW^Ⅵ12O40]·2H2O 1 (bipy = bipyridine) was prepared by a hydrothermal method for the first time. Single-crystal X-ray diffraction revealed that 1 (C40H40Co2N8O44SiW12) crystallizes in the triclinic system, space group P1 with a = 10.4979(6), b = 13.3946(7), c = 13.5756(8)A, α= 70.0769(18), β = 68.910(3), γ = 74.186(4)°, V = 1649.84(16)A^3, Mr = 3688.95, Z = 1, Dc = 3.713 mg·m^-3, μ = 21.432 mm^-1, F(000) = 1644, S = 1.058, the final R = 0.0511 and wR =0.1023 for 6523 observed reflections (I 〉 2σ(I)). Compound 1 consists of two coordinated cation fragments [Co^Ⅱ(2,2′-bipy)2(H2O)]^2+, one normal Keggin polyanion unit [SiW^Ⅵ12O40]^4- and two lattice water molecules. To be noted, each polyanion unit is linked to two cation fragments by its two surface terminal oxygen atoms and two cobalt atoms of two cation fragments forming an organic-inorganic hybrid unit in 1. Furthermore, the compound shows strong photoluminescence property in the solid state at room temperature.
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关 键 词: | Keggin 水热合成 联吡啶 晶体结构 组织 妇女 国际 社会 |
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