Resumo

GONZALEZ-TEJERA, M.J.  e  MARTIN, G. Hervás. Electrogeneration of Poly-N-Methylpyrrole Tosylate Doped Films: Electrochemical and Morphological Study. Port. Electrochim. Acta [online]. 2007, vol.25, n.3, pp.349-361. ISSN 0872-1904.

In order to investigate the electrochemical behaviour and morphology under different experimental conditions of poly-N-methylpyrrole doped with sodium p-toluensulphonate (NaTsO) in aqueous medium, the doped polymer was potentiostatically synthesized at four potential values: 0.6, 0.8, 0.9 and 1.0 V. The morphological study reveals a compact texture in these polymeric films; after being submitted to a positive potential those films were wrinkled. Cyclic voltammetry was used to characterize polymer films (pNMPy/TsO). The corresponding voltammograms revealed a reversible doping/de-doping process in those films obtained at η_p = 0.8 V. Different parameters such as: negative potential limit (E_i), positive potential limit (E_f), sweep rate (v) and continuous cycling were varied.

Palavras-chave : conducting polymers; poly-N-methylpyrrole; tosylate anion.

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