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Articles

Synthesis, crystal structure, and photo/electrocatalytic properties of a 1D chain based on monocobalt-substituted arsenotungstates

, , , , , & show all
Pages 1862-1871 | Received 15 Feb 2017, Accepted 18 Apr 2017, Published online: 11 May 2017
 

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.

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