Two new inorganic-organic hybrid compounds constructed from different polymolybdates and transition metal-amine subunits

Abstract

Two new polyoxometalate(POM)-based hybrid compounds, [Cu(en)][H₄Mo₄O₁₆]_0.5(1)(en=ethylenediamine) and [Ag(3-C₅H₆N₂)₂][H₂PMo₁₂O₄₀](2)(3-C₅H₆N₂=3-aminopyridine), containing different transition metalamine subunits were hydrothermally synthesized and characterized by elemental analyses, infrared spectroscopy and single-crystal X-ray diffraction. For compound 1, each [H₄Mo₄O₁₆]⁴(Mo₄O₁₆) cluster was linked to four neighboring Mo₄O₁₆ clusters through four [Cu(en)]²⁺ subunits to yield a (2,4)-connected 2D layer, which was further extended to a 3D supramolecular network via hydrogen bonding interactions. For compound 2, the adjacent [H₂PMo₁₂O₄₀]^– clusters were bridged by [Ag(3-C₅H₆N₂)₂]⁺ subunits to generate a 1D chain. The electrochemical behaviors and the photocatalytic activities of compounds 1 and 2 were studied in detail.

Keywords

Polyoxometalate / Metal-amine unit / Crystal structure / Electrochemical property / Photocatalysis

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