3D Supramolecular Array Assembled by Cross-like Arrangement of 1D Sandwich Mixed Molybdenum−Vanadium Polyoxometalate Bridged Coordination Polymer Chains: Hydrothermal Synthesis and Crystal Structure of {[MoVI5MoV3VIV8O40(PO4)][Ni(en)2]}[Ni(en)2]2·4H2O

Abstract

A novel organic−inorganic hybrid material constructed from mixed molybdenum−vanadium polyoxoanion clusters and [Ni(en)2]2+ complex groups {[MoVI5MoV3VIV8O40(PO4)][Ni(en)2]}[Ni(en)2]2·4H2O (1) (en = ethylenediamine), has been prepared under hydrothermal conditions and structurally characterized by single-crystal X-ray diffraction. Complex 1 exhibits an interesting three-dimensional supramolecular array through cross-like arrangement of a one-dimensional coordination polymer anion chain {[MoVI5MoV3VIV8O40(PO4)][Ni(en)2]}4-, which is sandwiched by discrete cation complex fragments [Ni(en)2]2+. It is the first example of a three-dimensional organic/inorganic hybrid polyoxometalate formed by cross-like arrangement of a one-dimensional polyoxometalate bridged coordination polymer chain.