1. Department of Chemistry, Fuzhou University,Fuzhou 350002,China 2. State Key Laboratory of Structral Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
Abstract:A series of supermolecules of PWxV12-x-MV( PWxV12-x: polyoxometalates x=2, 4, 6, 8, 10; MV: methyl violet ) with Keggin structure were prepared and their characters were studied by electronic spectra, infrared spectra and fluorescence spectra. As a result, the supermolecules were formed by the cooperating action between polyoxometalates and methyl violet. In the supermolecule, the structures of cation and anion are not destroyed. With the content of V increasing, the oxidation ability of polyoxometalates anion is enhanced, and the interaction of methyl violet cation and polyoxometalates anion is enhanced too. The FTIR absorption peaks of νas(MOt), νas(M—Ob—M) and νas(M—Oc—M) move from 966, 886, and 804 cm-1 to 955, 875 and 786 cm-1,respectively; the UV-Vis absorption peak moves from 519 to 506 nm; the emission peak excited at 530 nm moves from 692 to 644 nm too. These changes are according with the degree of the interaction of polyoxometalates and methyl violet.