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Journal of Coordination Chemistry
Year: 2008  |  Volume: 61  |  Issue: 13  |  Page No.: 2122 - 2131

Synthesis, structure and electrochemical behavior of an organic-inorganic hybrid compound based on Dawson-type polyoxometalates

Juan Wang, Feng-Biao Li, Li-Hong Tian and Shi-Yuan Cheng    

Abstract: An organic-inorganic hybrid compound constructed from Wells-Dawson polyanion clusters and metal-organic complex subunits, [Cu(phen)3][Cu(phen)2Cu(phen)2(P2W18O62)]·2H2O (1) has been prepared hydrothermally and characterized by elemental analysis, IR, UV, cyclic voltammetry (CV) and single-crystal X-ray diffraction. Crystal structural analysis indicates that two terminal oxygen atoms of the Wells-Dawson polyanion located in the “belt? site coordinate with Cu2+. Three Cu ions have different coordination environments: Cu1 and Cu2 are five-coordinate, while Cu3 is six-coordinate. The bisupporting polyoxoanions [Cu(phen)2Cu(phen)2(P2W18O62)]2- are polymerized into a 1D chain by hydrogen bonding interactions, then the chains are stacked into a two-dimensional structure via offset, face-to-face, π ··· π stacking interactions. CV reveals that 1 exhibits three chemically-reversible processes.

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