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https://elib.bsu.by/handle/123456789/212743
Title: | Photophysical properties of trans-2-[4-(dimethylamino)styryl] 3-ethyl-1,3-benzothiazolium perchlorate, a new structural analog of thioflavin T |
Authors: | Lavysh, A. V. Sulatskaya, A. I. Lugovskii, A. A. Voropay, E. S. Kuznetsova, I. M. Turoverov, K. K. Maskevich, A. A. |
Keywords: | ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Химия |
Issue Date: | 2014 |
Publisher: | Springer |
Citation: | Journal of Applied Spectroscopy, Vol. 81, No. 2, May, 2014 |
Abstract: | Spectral properties of a newly synthesized thiofl avin 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 redistributed 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 fluorescence lifetime of DMASEBT upon increasing the solvent viscosity and incorporating it into amyloid fi brils. |
URI: | http://elib.bsu.by/handle/123456789/212743 |
Appears in Collections: | Кафедра лазерной физики и спектроскопии (статьи) |
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Lavysh2014_Article_PhotophysicalPropertiesOfTrans.pdf | 369,86 kB | Adobe PDF | View/Open |
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