An organic–inorganic hybrid compound constructed by Strandberg-type polyoxoanions and transition metal coordination complexes

An organic–inorganic hybrid compound formulated as {[Cu(2,2′-bpy)(H2O)2]5[Cu(2,2′-bpy)(H2O)]}[P2Mo5O23]2·10H2O (1) has been isolated by conventional solution method and characterized by elemental analyses, IR, thermal stability analysis, magnetic susceptibility measurement and single-crystal X-ray diffraction analysis. The compound is a 1D chain structure built from Strandberg-type polyoxoanions [P2Mo5O23]6− and secondary copper coordination complexes along c axis. Extensive π–π interactions of the 2,2′-bpy ligands and hydrogen bonds from the adjacent chains lead to the three-dimensional structure. Magnetic susceptibility measurement reveals that the compound shows paramagnetic property with a magnetic moment about the Cu2+ ion, indicating very weak antiferromagnetic coupling between the neighboring Cu2+ ions in the structure.