Synthesis and Reversible Transformation of Cun‑Bridged (n = 1, 2, or 4) Silicodecatungstate Dimers
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Three copper-bridged sandwich-type silicodecatungstate dimers, TBA8[Cu(γ-SiW10O34)2(CH3CONH)2]·4H2O (Cu-1, TBA = tetra-n-butylammonium), TBA8H4[Cu2(γ-SiW10O36)2H2O]·11H2O·CH3COCH3 (Cu-2), and TBA8H2[Cu4(γ-SiW10O36)2(CH3COO)2]·5H2O (Cu-4) have been selectively synthesized by reactions of divacant lacunary TBA4[H4(γ-SiW10O36)] (SiW10) with copper acetate in organic media. The copper cation(s) in Cu-1, Cu-2, and Cu-4 possess square-planar four-coordinate (Cu-1), square-pyramidal five-coordinate (Cu-2), and octahedral six-coordinate (Cu-4) geometries, respectively. These compounds can reversibly be transformed simply by controlling the copper/SiW10 molar ratios in solutions.
创建时间：
2016-02-20
