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https://elib.bsu.by/handle/123456789/211768| 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. L. Lugovskii, A. A. Voropay, E. S. Kuznetsova, I. M. Turoverov, K. K. Maskevicha, A. A. |
| Keywords: | ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика |
| Issue Date: | 2014 |
| Publisher: | Springer |
| Citation: | Journal of Applied Spectroscopy, Vol. 81, No. 2, May, 2014 |
| Abstract (in another language): | 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: | http://elib.bsu.by/handle/123456789/211768 |
| Appears in Collections: | Кафедра лазерной физики и спектроскопии (статьи) |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 3-J. of Applied Spectr. V 81. No. 2014.pdf | 141,6 kB | Adobe PDF | View/Open |
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