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Crystal Research and Technology |
Cryst. Res. Technol. 41, 874 (2006) - Abstract -
Crystal structure and electrochemical behavior of a novel polyoxometalate [Ni(bpy)3]2[W4V2O19] with Lindqvist-type structure
Xin Wang, Baibin Zhou, Chongmin Zhong, and Mingyan Ji
Laboratory of Inorganic Synthesis and Function Material, Department of Chemistry, Harbin Normal University, Heilongjiang 150025, People’s Republic of China
| Keywords | hydrothermal synthesis, crystal structure, isopolyanions, redox property |
| PACS | 81.10.-h |
| DOI | 10.1002/crat.200510686 |
A novel polyoxometalate [Ni(bpy)3]2[W4V2O19] (Ni2V2W4) has been synthesized by the hydrothermal method and the structure determined by X-ray crystallography. Ni2V2W4 crystallizes in a trigonal system with space group R-3c (a = 15.8984 (5) Å, b = 15.8984 (5) Å, c = 43.855 (3) Å). In the structure of the compound, terminal and bridging oxygen atoms are bond to the metal centers by #sigam or π bonds. The W6+ and V5+ ions in isopolyanion [W4V2O19]4- statistically distribute over the six metal centers. Using cathodic adsorptive voltammetric method with a carbon paste electrode, the redox property and the electron transferring process were studied. The results show that electrochemical behavior about W(VI) and V(V) atoms give one-electron, three-electron and two-electron reduction waves. Three successive oxidation waves are observed too. The compound was also characterized by thermal gravimetric analysis and IR spectra.
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