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New electrode materials based on functionalized polypyrrole

I. CRACIUNESCU1,* , A. NAN1, R. TURCU1, LO GORTON2, I. C. POPESCU3

Affiliation

  1. National Institute for Research and Development of Isotopic and Molecular Technologies, Cluj-Napoca, Romania
  2. Department of Analytical Chemistry, Lund University, P.O. Box 124, SE-22100 Lund, Sweden
  3. Department of Physical Chemistry, “Babes-Bolyai” University, Cluj–Napoca, Romania

Abstract

New functional electrode materials, based on polypyrrole, were prepared by potentiostatic electro-copolymerization of pyrrole with two different pyrrole monomers, functionalized with carboxylic group: 3-(1-pyrrolyl)-propanoic acid and 4-oxo-4(1H-pyrrole-3-yl)butanoic acid. The properties of the polymeric electrode materials depend mainly on the synthesis method, monomers ratio, reaction time, and the composition of the supporting electrolyte. The obtained materials were characterized by Fourier transform infrared spectroscopy and cyclic voltammetry measurements. The poly-(pyrrole-co-β- (1pyrrolyl) propanoic acid) copolymer, deposited on the surface of a glassy carbon electrode, was used as anchor for covalent immobilization of Toluidine Blue (TB), by coupling its aromatic amino group (position 3) with the carboxylic groups existing on the modified electrode. The covalent binding of TB onto the functionalized electrode surface results in a stable modified glassy carbon electrode, exhibiting a better electrochemical activity than that corresponding to poly-TB, obtained by TB electropolymerization on the same electrode surface..

Keywords

Functionalized polypyrrole, Functional electrode materials, Toluidine Blue.

Submitted at: Feb. 25, 2008
Accepted at: Aug. 28, 2008

Citation

I. CRACIUNESCU, A. NAN, R. TURCU, LO GORTON, I. C. POPESCU, New electrode materials based on functionalized polypyrrole, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 9, pp. 2271-2276 (2008)