Synthesis, spectroscopic characterization and X-ray crystal structure of vanadylpolymolybdophosphates with monocapped Keggin polyanion [PMo_5V_7O_40(VO)]~(7-)

摘要

The preparation of the heteropolyoxometalates K_6[HPMo_5V_7O_40(VO)]·16H_2O (1), (n-Bu_4N)_4[H_3Pmo_5V_7O_40(VO)] (2) and (CN_3H_6[HPMo_5V_7O_40(VO)]·4H_2O (3) is described. Compounds 2 and 3 have been characterized by X-ray diffraction methods. Both compounds contain a monocapped Keggin anion. For compound 2 the capping V = O group is disordered in six sites, while there are two types of sites for the capping V = O group for compound 3. The IR spectra have been investigated.