A poly(pyrrole-Cobalt(II)deuteroporphyrin) electrode for the potentiometric determination of nitrite

被引：21

作者：

Cosnier, S

Gondran, C

Wessel, R

Montforts, FP

Wedel, M

机构：

[1] Univ Grenoble 1, CNRS, Inst Chim Mol Grenoble,UMR 5630, Lab Electrochim Organ & Photochim Redox, F-38041 Grenoble 9, France

[2] Chem Univ, Inst Organ Chem, FB Biol 2, D-28334 Bremen, Germany

来源：

SENSORS | 2003年 / 3卷 / 07期

关键词：

deuteroporphyrin; cobalt; polypyrrole; modified electrode; nitrite;

D O I：

10.3390/s30700213

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The electrochemical properties of a new Co(II) deuteroporphyrin substituted by two electropolymerizable pyrrole groups has been investigated in organic solvent. This functionalization has allowed the preparation of the first example of a cobalt deuteroporphyrin film by oxidative electropolymerization. The resulting conducting polypyrrole film exhibits the regular electroactivity of cobalt deuteroporphyrin. Compared to conventional cobalt porphyrin electrochemistry, the replacement of porphyrin macrocycle by deuteroporphyrin ring results in markedly more negative potential values for the metal-centered oxidation and reduction processes. The influence of NO2- as axial ligand on the reductive behavior of the electropolymerized cobalt (II) deuteroporphyrin is examined. The recognition properties of the film illustrated by the potentiometric shift of the Co(II)/(I) reduction were exploited for the determination of NO2- in the concentration range 2 10(-6)-2.5 10(-4) M.

引用

页码：213 / 222

页数：10

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