Synthesis and strong photooxidation power of a supramolecular hybrid comprising a polyoxometalate and Ru(ii) polypyridyl complex with zinc(ii)

Abstract

A novel method for constructing supramolecular hybrids composed of polyoxometalates and photofunctional metal complexes was developed. A Ru(II) complex with phosphonate groups (RuP) strongly interacted with Zn(II) to afford a 2 : 1 trinuclear metal complex ([(RuP)₂Zn]³⁺). In dimethylsulfoxide, [(RuP)₂Zn]³⁺ strongly interacted with a Keggin-type heteropolyoxometalate (Si-WPOM) to form a 1 : 1 hybrid ([(RuP)₂Zn]-POM). Irradiation of [(RuP)₂Zn]-POM in the presence of diethanolamine caused rapid accumulation of the one-electron reduced hybrid with a quantum yield of 0.99.