01760naa a2200241 a 450000100080000000500110000800800410001910000170006024500940007726000090017152010530018065300110123365300270124465300260127165300280129765300130132570000220133870000250136070000190138570000170140470000280142177300690144910288272008-04-25       1995    bl ---       0--  u    #d1 aMELLO, S. V.  aElectrochemical response of poly(o-ethoxyaniline) films produced by different techniques.  c1995  aPoly(o-ethoxyanilines) (POEA) were synthesized electrochemically and chemicalIy in aqueous acid media. POEA films were readily obtained during the electrochemical deposition on platinum electrodes, while the chemicalIy synthesized material was processed in the form of films either by drop coating or by Langmuir-Blodgett (LB) deposition. The open circuit potential values measured during the chemical synthesis, as welI as the color changes observed, are in close agreement with those of the electro-polymerization indicating basicalIy the same changes in oxidation states of the polymer structures. The electrochemical response of alI films was investigated by cyclic voltammetry. Two redox processes were observed after stabilization in the electrolyte solution, which are associated with interconversion reactions involving different oxidation and protonation states. Ultra-thin LB films required the shortest time for stabilization. POEA films displayed electrochromism, with color changes from yelIow to violet as a function of the potential.  afilmes  aLangmuir-Blodgett (LB)  aPolímeros condutores  aResposta eletroquímica  asíntese1 aMATTOSO, L. H. C.1 aSANTOS JÚNIOR J. R.1 aGONÇALVES, D.1 aFARIA, R. M.1 aOLIVEIRA JÚNIOR, O. N.  tElectrochimica Acta, Elmsfordgv. 40, n. 12, p. 1851-1855, 1995.