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• W2000831175 abstract "Poly(phenylene sulfide phenyleneamine), PPSA, is a soluble copolymer of poly(aniline) and poly(phenylene sulfide). Its electrochemical behavior has already been studied both aqueous and organic media the presence of different electrolytes, where it was observed the loss of electroactivity after few cycles. In this paper, the spectroelectrochemical characterization of PPSA films a room temperature ionic liquid (RTIL), 1-butyl-2,3-dimethylimidazolium bis(trifluoromethanes sulfonyl)imide (BMMITFSI), is shown. The electrochemical response of a PPSA modified electrode BMMITFSI is different from that obtained organic solvent/salt systems. In RTIL, two reversible redox processes were observed and they were assigned to the reversible radical cation/dication transition based on in situ UV-vis and Raman spectroscopic studies. The stabilization of the dicationic species RTIL is an explanation for the reversible electrochemical response of the PPSA BMMITFSI; on the contrary, when the electrochemical oxidation is carried out conventional organic electrolytes, once the oxidation of the sulfur atom occurs, a loss of electroactivity is observed being not possible to recover the pristine state of the polymer. FTIR and XRD data obtained for the fully oxidized polymer acetonitrile are consistent with the formation of a networked polymer due to the electrophilic attack of the positive sulfur atom on the activated aromatic rings. It is not the case RTIL due to the shielding of the charged sulfur atoms avoiding its reaction to other chains to form the networked polymeric matrix." @default.
• W2000831175 created "2016-06-24" @default.
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• W2000831175 date "2007-12-01" @default.
• W2000831175 modified "2023-09-28" @default.
• W2000831175 title "Spectroelectrochemical study of a soluble derivative of poly(aniline) in a room temperature ionic liquid" @default.
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• W2000831175 doi "https://doi.org/10.1016/j.electacta.2006.12.055" @default.
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