摘要

Two new inorganic-organic hybrid compounds: [Co(H2O)(2)(bimb)(2)](2)[SiW12O40] (1) and [Co-2(H2O)(bimb)(4)](HBW12O40)center dot H2O (2) (bimb 1,3-bis(1-imidazoly) benzene), have been synthesized under the same hydrothermal conditions and characterized by single crystal X-ray diffraction, IR spectra, elemental analyses and powder X-ray diffraction. Structural analyses show that 1 displays a 1D polymeric chain, whereas 2 presents a complicated 3D self-penetrating framework. The distinct structural features of the two compounds suggest that the charge of the Keggin anions should play a significant role in the process of assembly. The electrochemical properties of 1 and 2 were investigated in detail.