Grafting transition metal–organophosphonate fragments onto heteropolyoxomolybdate: activity in photocatalysis

Abstract

A novel organophosphonate-functionalized heteropolyoxomolybdate incorporated nickel cluster, CsNa₉[H₂{Ni₃O₂(H₂O)₆}(PMo₆O₂₁)₂{Ni(OOCCH₂NHCH₂PO₃)₂}₃]·21H₂O (1), has been synthesized, which represents the first member of the family of oxomolybdenum organophosphonate containing hexa-nuclear Ni(II) in a polyanion framework. The polyanion comprises a unique ladder-type {Ni₃O₁₀(H₂O)₆} cluster and three {Ni(OOCCH₂NHCH₂PO₃)₂} bridgings, which are capped on either end by a {PMo₆O₂₈} group. Photocatalytic experiments indicate that 1 exhibits catalytic activity for the photodegradation of RhB solution. Furthermore, magnetic studies indicate that 1 displays antiferromagnetic interactions.