Electrocatalysis of nitric oxide reduction by hemoglobin entrapped in surfactant films

被引：58

作者：

Mimica, D

Zagal, JH

Bedioui, F

机构：

[1] Ecole Natl Super Chim Paris, UMR CNRS ENSCP 7575, Lab Electrochim & Chim Analty, F-75231 Paris 05, France

[2] Univ Santiago Chile, Dept Quim Mat, Fac Quim & Biol, Santiago, Chile

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2001年 / 3卷 / 08期

关键词：

nitric oxide; reduction; hemoglobin; biomembranes; electrocatalysis;

D O I：

10.1016/S1388-2481(01)00196-5

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We have investigated the electrochemical reduction of NO catalyzed by hemoglobin, HbFe, trapped within a dimethyldidodecylammonium, bromide (DDAB) film cast on a glassy carbon electrode. The presence of NO in the electrolyte drastically changes the voltammetric response of the DDAB/HbFe film. Two reduction waves, with intensity proportional to NO concentration, are observed at -0.6 and -1.0 V versus SCE, respectively. The reduction wave at -1.0 V is a mass-transport controlled one. The typical voltammetric behavior of HbFe is discussed in terms of reactivity of the iron-heme enzyme toward NO, giving ferrous nitrosyl and nitroxyl adducts. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：435 / 438

页数：4

共 31 条

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