Abstract
In this paper we present thin films of polypyrrole (PPY) and polyaniline (PANi) which have been synthesized electrochemically on Gold electrode by direct oxidation of pyrrole and aniline in Acetonitrille using three electrodes. Raman spectroscopy results were analyzed in terms of normal modes, and spectra were obtained using 633 nm He-Ne laser. It was found that Raman spectra depend on the doping level of PPY and PANi. DFT force field has been calculated at the B3LYP/6-311+ G* level. General assignments of the vibrational spectra of polypyrrole and polyaniline have been proposed and were compared with those of pyrrole and aniline in order to determine the vibrational modes. Key words: Electropolymerization, polypyrrole, polyaniline, vibrational analysis modes, comparison of DFT functional, Raman spectroscopy.
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