Hydrothermal synthesis, structure and properties of copper–bipyridine complexes substituted mono-vacant Keggin arsenotungstate

A new arsenotungstate, [H2AsW11O39][Cu3(2,2′-bipy)3(H2O)2(OH)]·2H2O (1) (2,2′-bipy = 2,2′-bipyridine), has been hydrothermally synthesized and structurally characterized by elemental analysis, IR, UV–Vis, TG and single-crystal X-ray diffraction. The compound 1 represents the first example of copper–bipyridine complexes substituted mono-vacant Keggin polyoxotungstate containing AsV. Compound 1 exhibits fluorescent property at room temperature. Furthermore, compound 1 has been used as a solid bulk-modifier to fabricate bulk-modified carbon paste electrodes (1-CPE) by direct mixing. The electrochemical behavior and electrocatalysis of 1-CPE have been studied in detail.

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