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Formation of trans-2-[4-(Dimethylamino) Styryl]-3-Ethyl-1, 3-Benzothiazolium Perchlorate Dimers in the Presence of Sodium Polystyrene Sulfonateстатья
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: 12 июля 2017 г.
- Авторы: Lavysh A.V., Maskevich A.A., Lugovskii A.A., Voropay E.S., Sulatskaya A.I., Kuznetsova I.M., Turoverov K.K.
- Журнал: Journal of Applied Spectroscopy
- Том: 83
- Номер: 6
- Год издания: 2017
- Издательство: Springer-Verlag
- Местоположение издательства: Heidelberg, Germany
- Первая страница: 917
- Последняя страница: 923
- DOI: 10.1007/s10812-017-0384-8
- Аннотация: The spectral properties of a novel thioflavin T derivative, trans-2-[4-(dimethylamino)styryl]-3-ethyl-1,3-benzothiazolium perchlorate (DMASEBT), were studied in aqueous solutions in the presence of sodium polystyrene sulfonate (SPS). It was shown that SPS either could interact with dye monomers or initiate the formation of non-fluorescent dye dimers depending on the concentration ratio of dye and polyelectrolyte. DMASEBT dimer formation in the presence of SPS produced a hypsochromic shift by 40 nm in the absorption spectrum and quenched fluorescence. A bathochromic shift of the absorption spectrum and an increase of the fluorescence intensity by an order of magnitude were observed if DMASEBT monomers interacted with SPS. Quantum-chemical analysis found that sandwich dimers (H-aggregates) were most stable. A comparison of DMASEBT spectra in the presence of SPS and amyloid fibrils showed that DMASEBT molecules were incorporated into amyloid fibrils as monomers. The spectral changes associated with this incorporation could not be explained by the formation of dye aggregates.
- Добавил в систему: Сулацкая Анна Игоревна