Voltammetric studies on the reduction of polyoxometalate anions in ionic liquids

被引：84

作者：

Zhang, J ^{[1
]}

Bond, AM ^{[1
]}

MacFarlane, DR ^{[1
]}

Forsyth, SA ^{[1
]}

Pringle, JM ^{[1
]}

Mariotti, AWA ^{[1
]}

Glowinski, AF ^{[1
]}

Wedd, AG ^{[1
]}

机构：

[1] Monash Univ, Sch Chem, Clayton, Vic 3800, Australia

来源：

INORGANIC CHEMISTRY | 2005年 / 44卷 / 14期

关键词：

D O I：

10.1021/ic050032t

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

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][PF6], 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 determination of the reversible potential. Reduction processes involving very highly charged [alpha-S2W18O62](8-/9-/10-) species are strongly influenced by the purity of the medium.

引用

页码：5123 / 5132

页数：10

共 69 条

[1] How polar are room-temperature ionic liquids? [J].