FTIR INVESTIGATION OF THE POLYPYRROLE OXIDATION IN NA2SO4 AND NANO3 AQUEOUS-SOLUTIONS

Authors
MAIA G TICIANELLI EA NART FC
Citation
G. Maia et al., FTIR INVESTIGATION OF THE POLYPYRROLE OXIDATION IN NA2SO4 AND NANO3 AQUEOUS-SOLUTIONS, Zeitschrift für physikalische Chemie, 186, 1994, pp. 245-257
Citations number
23
Categorie Soggetti
Chemistry Physical","Physics, Atomic, Molecular & Chemical
Journal title
Zeitschrift für physikalische Chemie → ACNP
ISSN journal
09429352
Volume
186
Year of publication
1994
Part
2
Pages
245 - 257
Database
ISI
SICI code
0942-9352(1994)186:<245:FIOTPO>2.0.ZU;2-C
Abstract
The oxidation of polypyrrole films was studied by in situ FTIR spectro scopy and cyclic voltammetry in aqueous NaNO3 and Na2SO4 solutions. Th e charge injection in the polymer produces a pronounced change of the position of some vibrational modes; an inflection in the slope of the frequency-potential curves at 0 mV vs SCE is observed for some of thes e analysed bands. These results are in quite good agreement with theor etical calculations presented in the literature. It is also observed t hat the spectroscopic band shift of the 1223 cm-1 band correlates well with the voltammetric experiments.