期刊
JOURNAL OF PHYSICAL CHEMISTRY B
卷 106, 期 41, 页码 10585-10593出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp020770s
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The electrochemical oxidation of 3-(4-fluorophenyl) thiophene (FPT) at a platinum electrode in pure 1-ethyl-2,3-dimethylimidazolium his ((trifluoromethyl)sulfonyl) amide, EDMITFSI, and 1,3-diethyl-5-methylimidazolium bis ((trifluoromethyl)sulfonyl) amide, DEMITFSI, yielded an electroactive polymer. This polymer (PFPT) was similar to that prepared from common nonaqueous media such as tetraethylammonium tetrafluoroborate/acetonitrile, but it was characterized by slower ion insertion kinetics. A rapid loss of electroactivity of the polymer was observed upon cycling in pure ionic liquid, and that was attributed to gradual deswelling of the polymer. X-ray photoelectron spectroscopy measurements demonstrated that the doping processes of PFPT when cycled in pure ionic liquid were similar to those occurring in acetonitrile-based electrolyte and involved the incorporation of the anions (TFSI-) of the ionic liquid when the polymer was oxidized to the p-doped state. The expulsion of these anions and the incorporation of the ionic liquid cationic species were observed upon reduction of the polymer to the fully n-doped state.
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