REDOX POLYMER-FILMS CONTAINING ENZYMES .1. A REDOX-CONDUCTING EPOXY CEMENT - SYNTHESIS, CHARACTERIZATION, AND ELECTROCATALYTIC OXIDATION OF HYDROQUINONE

被引：280

作者：

GREGG, BA ^{[1
]}

HELLER, A ^{[1
]}

机构：

[1] UNIV TEXAS, DEPT CHEM ENGN, AUSTIN, TX 78712 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1991年 / 95卷 / 15期

关键词：

D O I：

10.1021/j100168a046

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A two-component redox-conducting epoxy cement has been prepared and electrochemically characterized. The redox epoxy, designed for use in enzyme electrodes (see following paper), is formed by reaching two water-soluble components (a poly(vinylpyridine) complex of Os(bpy)2Cl and a diepoxide) under near-physiological conditions. The resulting films are hydrophilic, strongly bound to gold and carbon electrode surfaces, and highly permeable to water-soluble molecules and ions. The electron "diffusion coefficient", D(e), of such films at 25-degrees-C, pH 7 is approximately (2-4) X 10(-9) cm2/s and shows an activation energy of 60 +/- 2 kJ/mol. D(e) increases with increasing ionic strength and with decreasing pH. Measurement of the characteristic current densities for electron "diffusion" and for the electrocatalytic oxidation of hydroquinone in the redox polymer shows that a substantial portion of the film is electroactive.

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页码：5970 / 5975

页数：6

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