Journal article

Voltammetric studies on the reduction of polyoxometalate anions in ionic liquids

J Zhang, AM Bond, DR MacFarlane, SA Forsyth, JM Pringle, AWA Mariotti, AF Glowinski, AG Wedd

Inorganic Chemistry | AMER CHEMICAL SOC | Published : 2005

Abstract

The electrochemical reduction of tetrabutylammonium salts of isostructural pairs of polyoxometalates [Bu4N]2[M6O19], [Bu4N]4[alpha-SiM12O40], and [Bu4N]4[alpha-S2M18O62] (M = Mo or W) has been investigated at glassy carbon electrodes in dissolved and surface-confined states in ionic liquids and other media. In the ionic liquid 1-n-butyl-3-methylimidazolium hexafluorophosphate [BMIM][PF(6)], between two and six reversible one-electron-transfer processes were detected. Detailed studies on the process [alpha-S2W18O62](4-/5-) in a range of ionic liquids, water, and conventional organic solvents (containing 0.1 M electrolyte) suggest that the polarity of the medium plays a key role in the determi..

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University of Melbourne Researchers