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Influência da acidez do meio sobre a síntese e o comportamento redox do polipirrol
Author(s) -
M. T. Giacomini,
Édson Antônio Ticianelli
Publication year - 1999
Publication title -
química nova
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.214
H-Index - 73
eISSN - 1678-7064
pISSN - 0100-4042
DOI - 10.1590/s0100-40421999000500002
Subject(s) - redox , aqueous solution , polypyrrole , fourier transform infrared spectroscopy , chemistry , polymer , inorganic chemistry , electrochemistry , polymer chemistry , polymerization , chemical engineering , organic chemistry , electrode , engineering
The influence of acidity on the synthesis and redox behavior of polypyrrole films was studied using galvanostatic and potentiodynamic techniques employing aqueous solutions formed by H2SO4/Na2SO4 , HCl/NaCl and HCl/CsCl. The chemical structure of the films were investigated using the FTIR technique. The polymer behavior as a function of the pH used in the cyclic voltammetric measurements is explained in terms of the mechanism responsible for the charge compensation formed during the polymer chain oxidation. From the FTIR measurements, it is seen that the water nucleophilic attack during the synthesis, does not occur under the experimental conditions employed in this work

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