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Electroactive polymeric material with condensed structure on the basis of magnesium(II) polyporphineстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Vorotyntsev Mikhail A., Konev Dmitry V., Devillers Charles H., Bezverkhyy Igor, Heintz Olivier
- Журнал: Electrochimica Acta
- Том: 56
- Номер: 10
- Год издания: 2011
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 3436
- Последняя страница: 3442
- DOI: 10.1016/j.electacta.2010.10.039
- Аннотация: Previous publication of the authors presented evidences that electrochemical oxidation of Mg(II)porphine (fully unsubstituted porphyrin, MgP) in acetonitrile (AN) at a very low potential leads to deposition of films at electrode surface corresponding to typical electroactive polymers, with their reversible transition between the electron-conducting and insulating states depending on the electrode potential/oxidation level ("film of type I"). It is demonstrated in the actual publication that these films in contact with a monomer-free solution are subject to an irreversible transformation to quite a different material ("film of type II") under the influence of a higher positive potential (above 0.5-0.6 V vs. Ag/Ag+ in AN). Films with the same properties may also be obtained directly by electrooxidation of the monomer, MgP, at a sufficiently high potential. Films of type II possess a high redox activity and electronic conductivity within the whole potential interval of above 3 V in the width. Their grayish color is related to a constant absorption intensity within the whole range of wavelengths studied (320-1000 nm). On the basis of a combination of experimental observations (ATR IR and XPS) and literature data the molecular structure of this new material is assumed to be polymer chains of directly linked porphine units (with a partial loss of Mg cations), probably with multiple bonds (meso-meso and beta-beta types) between neighboring units. (C) 2010 Elsevier Ltd. All rights reserved.
- Добавил в систему: Воротынцев Михаил Алексеевич