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Bulletin of the Chemical Society of Ethiopia

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Electrochemical synthesis and spectroscopic characterization of poly(N-phenylpyrrole) coatings in an organic medium on iron and platinum electrodes

A.K.D. Diaw, D. Gningue-Sall, M. Fall, M.M. Dieng, J.J. Aaron

Abstract


The electrochemical synthesis of poly(N-phenylpyrrole) film was achieved on pretreated iron and platinum electrodes in acetonitrile solutions containing 0.1 M N-phenylpyrrole as the monomer and 0.1 M tetrabutylammonium trifluoromethane sulfonate (Bu4NCF3SO3) as the supporting-salt. The results showed that a surface treatment by 10 % aqueous nitric acid inhibits iron dissolution without preventing the N-phenylpyrrole oxidation. Very strongly adherent films were obtained at constant-potential, constant-current and cyclic voltammetry. XPS measurements, infrared (FT-IR) and electronic absorption (UV-vis) spectroscopies were used to characterize the iron and platinum-coated electrodes. Finally the anticorrosion properties of the PfP film were evidenced.

 

KEY WORDS: Polypyrrole, Poly(N-phenylpyrrole), Electropolymerization, Conducting polymers, Corrosion

 

 

Bull. Chem. Soc. Ethiop. 2008, 22(3), 403-413.




http://dx.doi.org/10.4314/bcse.v22i3.61222
AJOL African Journals Online