[Synthesis and spectroscopic studies of supermolecules of PW(x)V(12 - x)-MV].
A series of supermolecules of PW(x)V(12 - x)-MV (PW(x)V(12 - 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 nu(as)(M=O(t)), nu(as)(M-O(b)-M) and nu(as)(M-O(c)-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.
Wu
Xiao-yuan
XY
Department of Chemistry, Fuzhou University, Fuzhou 350002, China.
Zhang
Han-hui
HH
Huang
Chang-cang
CC
Sun
Rui-qing
RQ
Yang
Qi-yu
QY
Lin
Zhi-hua
ZH
Chen
You-xing
YX