Assembly of one novel polyoxometalate-based inorganic–organic compound from copper-Schiff base building block: Synthesis, crystal structure and spectral properties

A novel copper(II) inorganic–organic hybrid compound [CuL(DMF)(CH3OH)]2(PMoVMoVI11O40)·2DMF (L = phenyl 2-pyridyl ketone azine) 1 has been synthesized and characterized by IR, UV, elemental analysis and X-ray crystallography. Cu(II) atom has a distorted square pyramidal environment interconnecting with N3O2 donor set. In solid-state there are three types of CH⋯π interactions between adjacent [CuL(DMF)(CH3OH)]2+, which generate a two-dimensional (2D) layer. Adjacent 2D layers form porous channels in which polyoxoanions as templates are filled. Simultaneously, the oxygen atoms of polyoxoanion as electron acceptors feather multiple intermolecular hydrogen bonds, through which giving rise to a 3D supramolecular network. The luminescent properties of the compound 1 were investigated in the solid state and in aqueous solution at room temperature, respectively.

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► One novel POM-based compound has been synthesized with copper-Schiff base.
► The compound has been characterized by IR, UV and elemental analysis.
► X-ray single-crystal structure analyses and discussion for the compound.
► The luminescent properties were investigated in solid-state and aqueous solution.