Abstract
A chain based on the Keggin polyoxoanions, (H2bipy)2(Hbipy) [AsW11CoO39]·H2O (bipy = 4,4′-bipyridine) (1) has been hydrothermally synthesized and characterized by elemental analysis, IR, UV, TG, and single-crystal X-ray diffraction. In 1, substituted cobalt atoms share half occupancy sites with two W atoms on two asymmetric positions of opposite W3O13 trimers forming mono-substituted Keggin arsenotungstate. The Keggin clusters of two different arrays are alternately connected to generate unique wave-like chains in –A–B–A–B– ways via Co–O–W bridge. Compound 1 exhibits bifunctional electrocatalytic behavior for oxidation of ascorbic acid (AA) and reduction of hydrogen peroxide (H2O2), and good degradation ability for three typical dyes under UV light.