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Excitation of photosystem I by 760 nm femtosecond laser pulses: transient absorption spectra and intermediatesстатья
- Авторы: Cherepanov Dmitry A., Shelaev Ivan V., Gostev Fedor E., Mamedov Mahir D., Petrova Anastasia A., Aybush Arseniy V., Shuvalov Vladimir A., Semenov Alexey Yu, Nadtochenko Victor A.
- Журнал: Journal of Physics B: Atomic, Molecular and Optical Physics
- Том: 50
- Год издания: 2017
- Издательство: IOP Publishing
- Местоположение издательства: [Bristol, UK], England
- DOI: 10.1088/1361-6455/aa824b
- Аннотация: Excitation of photosystem I (PS I) by a femtosecond 760 nm pump leads to one- and two-photon absorption. The one-photon excitation produces intermediates with transient absorption spectra similar to the spectra of the primary [P700+ A0- A1] and secondary [P700+ A0 A1-] ion-radical pairs in the PS I reaction center. The two-photon absorption generates the upper level excited states of chlorophyll (Chl) and carotenoid molecules in the antenna. These excited states are converted into the long-lived intermediates and can be tentatively attributed to the excited and charge–transfer ion-radical states of Chl molecules and to the excited states of carotenoids in the antenna. The transient spectra of intermediates generated by two-photon excitation differ from the transient one-photon spectra of the primary and secondary ion-radical pairs.
- Добавил в систему: Петрова Анастасия Александровна