Fluorescence of 5-fluorouracil upon the transition from the second singlet excited state S2 to the ground state

Effect of the wavelength of excitation light (λ ex ) on the fluorescence excitation and emission spectra of 5-fluorouracil in acidic solution (pH 2.5) was studied upon excitation at the S 2 ← S 0 -transition absorption band. It has been found that direct excitation at the second or the shorter wavel...

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Bibliographic Details
Published in:High energy chemistry 2011-03, Vol.45 (2), p.130-132
Main Authors: Ostakhov, S. S., Gantsev, Sh. Kh, Kazakov, V. P., Sultanbaev, M. V., Khamitova, G. V., Ishmuratova, R. Sh
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Photochemistry
Physical Chemistry
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Summary:Effect of the wavelength of excitation light (λ ex ) on the fluorescence excitation and emission spectra of 5-fluorouracil in acidic solution (pH 2.5) was studied upon excitation at the S 2 ← S 0 -transition absorption band. It has been found that direct excitation at the second or the shorter wavelength absorption band results in 5-fluorouracil fluorescence that originates not only from the first excited state S 1 but is also due the transition from the second excited state S 2 to the ground state.
ISSN:0018-1439
1608-3148
DOI:10.1134/S0018143911020111