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- Title
Comparative Absorption Dynamics of the Singlet Excited States of Chlorophylls a and d.
- Authors
Cherepanov, Dmitry A.; Petrova, Anastasia A.; Mamedov, Mahir D.; Vishnevskaya, Anna I.; Gostev, Fedor E.; Shelaev, Ivan V.; Aybush, Arseniy V.; Nadtochenko, Victor A.
- Abstract
Transient absorption dynamics of chlorophylls a and d dissolved in tetrahydrofuran was measured by the broadband femtosecond laser pump-probe spectroscopy in a spectral range from 400 to 870 nm. The absorption spectra of the excited S1 singlet states of chlorophylls a and d were recorded, and the dynamics of the of the Qy band shift of the stimulated emission (Stokes shift of fluorescence) was determined in a time range from 60 fs to 4 ps. The kinetics of the intramolecular conversion Qx→Qy (electronic transition S2→S1) was measured; the characteristic relaxation time was 54 ± 3 and 45 ± 9 fs for chlorophylls a and d, respectively.
- Subjects
CHLOROPHYLL; STIMULATED emission; FEMTOSECOND lasers; LASER spectroscopy; STOKES shift; TIME-resolved spectroscopy; CHLOROPHYLL spectra
- Publication
Biochemistry (00062979), 2022, Vol 87, Issue 10, p1179
- ISSN
0006-2979
- Publication type
Article
- DOI
10.1134/S000629792210011X