A novel disubstituted Lindqvist-type polyoxomolybdate [Te2Mo4O_(19)]~(6-) supporting two organic vanadyl moieties:Synthesis,characterization,and crystal structure of {[V(2,2-bipy)2]2(4,4-bipy)[Te2Mo4O_(19)]}

摘要

The first example of disubstituted Lindqvist-type polyoxomolybdate {IV(2,2-bipy)2]2(4,4-bipy)[Te2-Mo4O_(19)]) has been synthesized hydrothermally and characterized by elemental analyses,XPS,1R,TG-DTA and X-ray single crystal diffraction.The structural analysis shows that the neutral molecular unit [V(2,2-bipy)2]2[Te2Mo4O_(19)] consists of a novel Lindqvist-type polyanion [Te2Mo4O_(19)]~(6-) supporting two vanadyl moieties [V(2,2-bipy)2]~(3+),and such neutral molecules are joined together by pi-pi stacking interactions between the pyridine groups to form a two-dimensional grid-like network with non-coordinating "guest" 4,4-bipys encapsulated.