A neutron reflectivity study of [Os(bipy)2(PVP)10Cl]+ polymer film modified electrodes:: effect of redox state and counter ion

被引：8

作者：

Wilson, RW

Cubitt, R

Glidle, A

Hillman, AR ^{[1
]}

Saville, PM

Vos, JG

机构：

[1] Univ Leicester, Dept Chem, Leicester LE1 7RH, Leics, England

[2] Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland

[3] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France

[4] Australian Natl Univ, Res Sch Chem, Canberra, ACT 0200, Australia

[5] Dublin City Univ, Sch Chem Sci, Dublin 9, Ireland

来源：

ELECTROCHIMICA ACTA | 1999年 / 44卷 / 20期

基金：

英国工程与自然科学研究理事会;

关键词：

redox polymer; modified electrode; neutron reflectivity;

D O I：

10.1016/S0013-4686(99)00113-9

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The effects of redox state (Os[II] vs. Os[III]) and counter ion (perchlorate vs, p-toluenesulphonate) on the polymer and solvent density distributions in films of electroactive [Os(bipy)(2)(PVP)(10)Cl](+) were determined using neutron reflectivity. The changes in polymer structure upon immersion in solvent and upon redox cycling the film in these electrolytes were also investigated. The as-prepared dry polymer film swelled appreciably upon immersion in aqueous solutions. Using p-toluenesulphonate as the counter ion caused pronounced changes to film structure upon both redox cycling and holding it in a fixed oxidation state; the perchlorate anion was found to be much less disruptive. Surprisingly, the effect on film structure of changing anion was much more pronounced than the effect of changing film redox state, i.e. charge density. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：3533 / 3548

页数：16

共 30 条

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