Abstract
An unusual 3-D organic-inorganic hybrid based on arsenomolybdate, [{CuI(pyr)2}6(As2Mo6O26)]·H2O (1) (pyr = pyrazole) has been synthesized under hydrothermal conditions and structurally characterized by elemental analysis, IR, TG, PXRD, UV–vis, and single-crystal X-ray diffraction. In compound 1, basic structural unit {As2Mo6O26} (abbreviated as {As2Mo6}) as dodeca-dentate ligand utilizes all of its terminal oxygen atoms (12) of {Mo6O24} ring to connect with 12 {Cu(pyr)2} linkers at its periphery. Two {Cu(pyr)2} complexes are bonded together to form binuclear complex unit {Cu2(pyr)4} via sharing two u3-O atoms, which can be viewed as bidentate linker to further connect with adjacent two {As2Mo6} clusters. The coordination number and modes of {As2Mo6} cluster and Cu+ ions together result in a 2, 12-connected 3D open-skeleton with a new {26·448·612}{2}6 topology, which represents the highest connection of {As2Mo6}-based inorganic-organic hybrid. Compound 1 exhibits good fluorescent properties in solid state at room temperature and bifunctional electrocatalytic activities for oxidation of ascorbic acid (AA) and reduction of nitrite (NO2−).
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