Two High-Nuclear Wheel-Hub-Shaped Transition-Metal-Doped Polyoxovanadates.

The first two unprecedented high-nuclear wheel-hub-shaped transition-metal-doped polyoxovanadates, [M 8 Mo 4 W 4 V 20 P 20 ] [M = Ni ( 1 ), Co ( 2 )], have been assembled under solvothermal conditions. The center of the cluster consists of two {Ni 4 (oa) 4 } rings as the center hole, four {MoO 4 } units acting as the spokes, and four {WV 5 (PPOA) 5 } molecular building blocks serving as the tire. Compound 1 exhibits good catalytic properties and recyclability in oxidative desulfurization reactions.