Temperature dependence of tryptophan fluorescence lifetime in aqueous glycerol and trehalose solutions
- Autores: Gorokhov V.1, Knox P.1, Korvatovskiy B.1, Seifullina N.1, Goryachev S.1, Paschenko V.1
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Afiliações:
- Lomonosov Moscow State University
- Edição: Volume 82, Nº 11 (2017)
- Páginas: 1269-1275
- Seção: Article
- URL: https://journals.rcsi.science/0006-2979/article/view/151500
- DOI: https://doi.org/10.1134/S0006297917110049
- ID: 151500
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Resumo
The temperature dependences of tryptophan fluorescence decay kinetics in aqueous glycerol and 1 M trehalose solutions were examined. The fluorescence decay kinetics were recorded in the spectral region of 292.5–417.5 nm with nanosecond time resolution. The kinetics curves were approximated by the sum of three exponential terms, and the spectral distribution (DAS) of these components was determined. An antisymbatic course of fluorescence decay times of two (fast and medium) components in the temperature range from –60 to +10°C was observed. The third (slow) component showed only slight temperature dependence. The antisymbatic behavior of fluorescence lifetimes of the fast and medium components was explained on the assumption that some of the excited tryptophan molecules are transferred from a short-wave-length B-form with short fluorescence lifetime to a long-wavelength R-form with an intermediate fluorescence lifetime. This transfer occurred in the indicated temperature range.
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Sobre autores
V. Gorokhov
Lomonosov Moscow State University
Email: vz.paschenko@gmail.com
Rússia, Moscow, 119991
P. Knox
Lomonosov Moscow State University
Email: vz.paschenko@gmail.com
Rússia, Moscow, 119991
B. Korvatovskiy
Lomonosov Moscow State University
Email: vz.paschenko@gmail.com
Rússia, Moscow, 119991
N. Seifullina
Lomonosov Moscow State University
Email: vz.paschenko@gmail.com
Rússia, Moscow, 119991
S. Goryachev
Lomonosov Moscow State University
Email: vz.paschenko@gmail.com
Rússia, Moscow, 119991
V. Paschenko
Lomonosov Moscow State University
Autor responsável pela correspondência
Email: vz.paschenko@gmail.com
Rússia, Moscow, 119991