1. Department of Chemistry, Fuzhou University, Fuzhou 350002, China 2. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
Abstract：Three polyoxovanadium clusters, [{Ni(phen)2}2V4O12]·H2O Ⅰ，[N(CH2CH2)3NH]Na(H2O)6{K4(H2O)4[V10O28]}(H2O)4 Ⅱ and [(CH3)4N]6[V15O36Cl] Ⅲ, have been synthesized under hydrothermal condition. The relationship between their properties and structures were studied by using FTIR, UV-Vis DRS and flurescence. The FTIR showed that the vibrational frequencies of the group are related to the structure of the materials. In UV-Vis DRS spectra of compound Ⅰ, there are four characteristic wide peaks at 200, 230, 260 and 350 nm corresponding to Ot→V, Oμ→Ni，Oμ→V charge transfer and phen’s π-π*, respectively. The fluorescence spectra of clusters have been studies. Finally, the quantum chemistry calculation was performed by Gaussian 98 program to explain the structure characteristic of compound Ⅰ.
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