A polypyrrole-CobaltIIdeuteroporphyrin electrode for the potentiometric determination of nitriteReport as inadecuate




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1

Laboratoire dElectrochimie Organique et de Photochimie Rédox, UMR CNRS 5630, Institut de Chimie Moléculaire de Grenoble, FR CNRS 2607, Université Joseph Fourier, BP 53, 38041 Grenoble Cedex 9, France

2

Institut für Organische Chemie, FB 2 Biologie, Chemie der Universität Postfach 330 440, D-28334 Bremen, Germany





*

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Abstract The electrochemical properties of a new CoII 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 metalcentered 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 CoII-I reduction were exploited for the determination of NO2- in the concentration range 2 10-6- 2.5 10-4 M.

Keywords: Deuteroporphyrin; Cobalt; Polypyrrole; Modified electrode; Nitrite Deuteroporphyrin; Cobalt; Polypyrrole; Modified electrode; Nitrite





Author: Serge Cosnier 1,* , Chantal Gondran 1, Rudolf Wessel 1, Franz-Peter Montforts 2 and Michael Wedel 2

Source: http://mdpi.com/



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