Hydrothermal synthesis, structure and properties of copper-bipyridine complexes substituted mono-vacant Keggin arsenotungstate
A new arsenotungstate, [H 2AsW 11O 39][Cu 3(2,2'-bipy) 3(H 2O) 2(OH)]·2H 2O ( 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 As V. 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.