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Intermolecular electron transfer in low-molecular-weight polyaniline models associating on protonation by amphiphilic acid in organic solventстатья
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: Lokshin N.A.a, Pyshkina O.A.a, Golubev V.B.a, Sergeyev V.G.a, Zezin A.B.a, Kabanov V.A.a, Levon K.b., Piankijsakul S.b.
- Журнал: Macromolecules
- Том: 34
- Номер: 16
- Год издания: 2001
- Издательство: American Chemical Society
- Местоположение издательства: United States
- Первая страница: 5480
- Последняя страница: 5486
- DOI: 10.1021/ma002085u
- Аннотация: Protonation of N-(4-aminophenyl)-N-4-[(4-aminophenyl)imino]-2,5-cyclohexadien-1-yliden-1,4-be nzediamine and N-[4-(dimethylamino)phenyl]-N-(4-[4-(dimethylamino)phenyl]imino-2,5-cyclo-hexa dien-1-ylidene)amine as trianiline models of polyaniline emeraldine base (PANI-EB) with dodecyl-benzenesulfonic acid (DBSAH), a typical organo-soluble acidic dopant, in chloroform and 1-methyl-2-pyrrolidinone solutions, and also interaction of the resulting products with distearyldimethylammonium chloride (DDAC) as a potential dedoping agent were studied at ambient temperature by UV-vis and ESR spectroscopic methods. It has been shown that protonation is followed by intermolecular proton-electron transfer and results in the formation of monoradical cations apparently paired with the counterions which tend to associate even in rather dilute chloroform solutions and form aggregates characterized by intermolecular electron interchange. These aggregates, however, dissociate on adding an excess of the protonating agent, revealing an ESR signal line with resolved hyperfine structure which corresponds to a monoradical with unpaired electron interacting with two N nuclei. The proposed reaction mechanism probably can be applied to doping higher oligoanilines and PANI-EB. It is also shown that the protonated trimer complexes can be deprotonated ("dedoped") in chloroform solution on adding DDAC. This is in contrast to PANI-EB doped with DBSAH, which could not be deprotonated with cationic amphiphiles.
- Добавил в систему: Зезин Александр Борисович