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Dynamic hole burning within special pair absorption band of Rhodobacter sphaeroides (R‐26) reaction center at room temperature
Author(s) -
Streltsov A.M.,
Yakovlev A.G.,
Shkuropatov A.Ya.,
Shuvalov V.A.
Publication year - 1995
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(94)01346-3
Subject(s) - rhodobacter sphaeroides , femtosecond , absorbance , wavelength , chemistry , absorption (acoustics) , laser , atomic physics , molecular physics , absorption spectroscopy , photosynthetic reaction centre , photochemistry , analytical chemistry (journal) , materials science , optics , physics , electron transfer , optoelectronics , photosynthesis , biochemistry , chromatography
The absorbance spectrum of reaction centers of Rhodobacter sphaeroides at room temperature consists of relatively narrow spectral components which are moving in the femtosecond time scale and can be bleached by femtosecond laser pulses in the short wavelength region with a subsequent broadening and red shift of the bleaching (time constant ∼ 250 fs). These data are discussed in terms of the population of the vibronic wave packets in the ground state by the interaction with phonons at 293K. The motion of these packets is probably responsible for the absorbance spectrum of the primary electron donor P at 293K with enhanced short wavelength components and with suppressed Stokes components.