Synthesis, structure and electrochemical properties of a new hybrid based on Wells-Dawson polyanions and silver complexes

A new hybrid constructed from Wells-Dawson polyanions and silver complexes, [Ag(bipy)](2)[Ag(bipy)(H-bipy)][P2W18O62]center dot[H(2)bipy] (1) (bipy = 4,4'-bipyridine), has been hydrothermally synthesized, and characterized by IR, TG, XRPD and single-crystal X-ray diffraction. Structural analysis reveals that compound 1 possesses left- and right-helical chains constructed by Ag(bipy) complexes. Furthermore, these helical chains are linked together by Ag atoms via sharing O atoms of the Wells-Dawson polyanions to form two-dimensional (2D) sheets. Finally, a 3D framework is obtained with (4(1).6(4).8(1))(4(6).6(2).8(2).10(5)) topology. which is constructed by the 2D sheets through the O atoms of the Wells-Dawson polyanions. Also, the electrochemical behavior and electrocatalysis of 1 modified carbon paste electrode (1-CPE) have been studied in detail. The results indicate that 1-CPE has remarkable stability and good electrocatalytic activities. (C) 2009 Elsevier B.V. All rights reserved.