Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9634243 | Journal of Electroanalytical Chemistry | 2005 | 7 Pages |
Abstract
Poly[(R)-(-)-3-(l-pyrrolyl)propyl-N-(3,5-dinitrobenzoyl)-α-phenylglycinate] films were deposited on ITO electrodes using potentiodynamic and galvanostatic methods. Polymerization occurred as a charge dependent process at 1.0 V vs. Ag/Ag+(CH3CN) and was not affected by the presence of nitro groups in the monomer. The surface morphology of the film and its electrochemical properties were studied as a function of deposition charge (Qdep) and deposition method. Film thickness increased in a quasi-linear manner with respect to Qdep within the range 40-80 mC cm2. The galvanostatic method provided easier control of Qdep compared with potentiodynamic deposition, and produced a more adherent film with homogeneous grain geometry. Cyclic voltammetry revealed a well defined redox couple at the anodic region, attributable to polymer p-doping, and a poorly defined redox pair at the cathodic region, attributable to the reduction of the nitro group.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Adriana Santos Ribeiro, Alisson Urbano da Silva, LıÌvia M.O. Ribeiro, José Ginaldo da Silva, Marcelo Navarro, Josealdo Tonholo,