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Transient Absorption Study of Two-Photon Excitation Mechanism in the LH2 Complex from Purple Bacterium Rhodobacter sphaeroidesстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Stepanenko Ilya, Kompanetz Viktor, Makhneva Zoya, Chekalin Sergey, Moskalenko Andrei, Razjivin Andrei
- Журнал: Journal of Physical Chemistry B
- Том: 116
- Номер: 9
- Год издания: 2012
- Издательство: American Chemical Society
- Местоположение издательства: United States
- Первая страница: 2886
- Последняя страница: 2890
- DOI: 10.1021/jp2033214
- Аннотация: The mechanism of two-photon excitation of a peripheral light-harvesting complex LH2 (B800-850) from purple bacterium Rhodobacter sphaeroides was explained on the basis of femtosecond transient absorption data. Fast bleaching of the B850 absorption band was measured under two-photon excitation by 1350 nm femtosecond pulses, showing fast subpicosecond arrival of excitation energy to B850 circular aggregates. Any spectral changes connected with the B800 absorption band of B800-BChl molecules were absent. A similar picture was observed under one-photon excitation of the LH2 complex by 675 nm femtosecond pulses. We believe these effects may be attributed to direct excitation of high-energy excitonic states of a B850 circular aggregate or its vibrational manifold in accordance with the model of Abe [Chem. Phys. 2001, 264, 355-363].
- Добавил в систему: Разживин Андрей Павлович