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Заглавие документа:	Photophysical properties of trans-2-[4-(dimethylamino)styryl]- 3-ethyl-1,3-benzothiazolium perchlorate, a new structural analog of thioflavin T
Авторы:	Lavysh, A. V. Sulatskaya, A. L. Lugovskii, A. A. Voropay, E. S. Kuznetsova, I. M. Turoverov, K. K. Maskevicha, A. A.
Тема:	ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика
Дата публикации:	2014
Издатель:	Springer
Библиографическое описание источника:	Journal of Applied Spectroscopy, Vol. 81, No. 2, May, 2014
Аннотация (на другом языке):	Spectral properties of a newly synthesized thioflavin T (ThT) derivative, trans-2-[4-(dimethylamino)styryl]-3-ethyl-1,3-benzothiazolium perchlorate (DMASEBT) with absorption and fl uorescence spectra shifted to longer wavelengths (than ThT), were studied. Quantum-chemical calculations established that DMASEBT is planar in the ground state.The energy minimum of the excited molecule corresponded to a twisted conformation (TICT-state) with a 90° angle between the planar fragments. Charge in the molecule edistributed and a non-fl uorescing TICT-state was formed if the fragments rotated. Fluorescence occurred from the non-equilibrium excited state (LE-state). It was shown that limited torsional rotation of the molecular fragments and; therefore, a decreased probability of transitioning into the non-fl uorescing TICT-state, were responsible for the signifi cantly increased quantum yield and fl uorescence lifetime of DMASEBT upon increasing the solvent viscosity and incorporating it into amyloid fi brils.
URI документа:	http://elib.bsu.by/handle/123456789/211768
Располагается в коллекциях:	Кафедра лазерной физики и спектроскопии (статьи)

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