Electropolymerizable iron (III) and cobalt (II) dicyanophenoxy tetraphenylporphyrin complexes: Potential electrocatalysts

Two novel asymmetric dicyanophenoxy-derivatised iron (III) and Co(II) porphyrin complexes have easily been electropolymerised onto glassy carbon electrodes. The thin solid films exhibited excellent stability and electrocatalysis towards the direct detection of important analytes such as nitrite, nit...

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Bibliographic Details
Published in:Inorganic chemistry communications 2006-02, Vol.9 (2), p.223-227
Main Authors: Ozoemena, Kenneth I., Zhao, Zhixin, Nyokong, Tebello
Format: Article
Language:English
Subjects:
Chronoamperometry
Electropolymerisation
Hydrogen peroxide
Iron and cobalt dicyanophenoxy-derivatised porphyrins
Nitric oxide
Nitrite
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Summary:Two novel asymmetric dicyanophenoxy-derivatised iron (III) and Co(II) porphyrin complexes have easily been electropolymerised onto glassy carbon electrodes. The thin solid films exhibited excellent stability and electrocatalysis towards the direct detection of important analytes such as nitrite, nitric oxide, and hydrogen peroxide in aqueous solutions. Solution and solid phase electrochemical features of 5-[4-(3,4-dicyanophenoxy)phenyl],10,15,20-triphenylporphyrin complexes of iron(III) (FeCNOTPP(Cl)) and cobalt(II) (CoCNOTPP) have been described. These novel asymmetric dicyanophenoxy-derivatised cobalt and iron porphyrin complexes were electropolymerised onto glassy carbon electrodes, which in aqueous solutions, gave surface concentrations (ca. 10 −10 mol cm −2) typical of monolayer coverages. The films also exhibited excellent stability and electrocatalysis towards the direct detection of important analytes as nitrite, nitric oxide, and hydrogen peroxide in aqueous solutions.
ISSN:1387-7003
1879-0259
DOI:10.1016/j.inoche.2005.11.024