New compounds constructed from polyoxometalates and transition metal coordination complexes with lower positive charge

Abstract

Five new hybrid compounds constructed from polyoxometalates and transition metal coordination complexes with lower positive charge: [PW₁₁CuO₃₉][Cu(bpy)₂]₅ (1), [BW₁₂O₄₀][Cu(bpy)₂]₅ (2) [BW₁₂O₄₀][Cu(Phen)₂]₃[Cu(Phen)(H₂O)]₂·2H₂O (3), [SiW₁₂O₄₀][Cu(bpy)₂]₄ (4) and [PW₁₂O₄₀][Cu(bpy)₂]₄ (5) have been prepared and characterized by IR, UV-Vis, XPS, XRD and single crystal X-ray diffraction analyses. The packing motif of the [Cu(bpy)₂]⁺ copper coordination complexes in compound 1 exhibits square supramolecular channels running along the a axis, which are then filled by the [PW₁₁CuO₃₉]⁵⁻ ions. Compound 2 is isomorphours with compound 1. Compound 3 contains a novel 2-D supramolecular layer structure constructed from [Cu(Phen)₂]⁺ copper coordination complexes through π⋯π interactions. The packing motif of the [Cu(bpy)₂]⁺ copper coordination complexes in compound 4 exhibits a supramolecular channel which is different from compound 1. Compound 5 is isomorphours with compound 4.