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Influence of chloride anions on the electrodeposition and electroactivity of the polymer matrix in polypyrrole, poly(N-methylpyrrole) and polypyrrole derivatives functionalized by titanocene centers, in dry non-aqueous solutionsстатья
Информация о цитировании статьи получена из
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Skompska M., Vorotyntsev M.A.
- Журнал: Journal of Solid State Electrochemistry
- Том: 8
- Номер: 6
- Год издания: 2004
- Издательство: Springer Verlag
- Местоположение издательства: Germany
- Первая страница: 360
- Последняя страница: 368
- DOI: 10.1007/s10008-003-0472-y
- Аннотация: We report electrochemical studies on the influence of a small concentration of chloride ions on the electroactivity of the polymer matrix of polypyrrole (PPy), poly(N-methylpyrrole) [p(N-MePy)] and a poly(titanocene-propyl-pyrrole) derivative, p(Tc3Py) [Tc(CH2)(3)NC4H4; Tc=CpCp'TiCl2; Cp=C5H5; Cp'=C5H4] in acetonitrile (AN), tetrahydrofuran (THF) and N,N-dimethylformamide (DMF). The polymer films were obtained on Pt disc electrodes from AN solutions of the monomers containing 0.1 M tetrabutylammonium hexafluorophosphate (TBAPF(6)) as the supporting electrolyte and then transferred to the corresponding monomer-free solution. Studies in Cl--containing solutions have shown that the p(Tc3Py) matrix is very sensitive to the presence of Cl- ions in all the above solvents, namely that it was subjected to electrochemical degradation at potentials above 0.1 V vs. a Ag/0.01 M Ag+ in AN reference electrode. Degradation of the p(Tc3Py) matrix was also observed in chloride-free DMF+TBAPF(6) solutions. Addition of chloride ions to the AN solution containing pyrrole, N-methylpyrrole or Tc3Py inhibits the deposition of the polymer films. On the other hand, we have found that PPy and p(N-MePy) matrices after their deposition in chloride-free AN solutions show much more stable redox responses in contact with chloride and/or DMF solutions. Possible mechanisms of these effects are discussed.
- Добавил в систему: Воротынцев Михаил Алексеевич