FEBS Letters | |
Picosecond absorbance difference spectra of the antenna of photosynthetic purple bacteria The influence of exciton interactions and librations | |
Novoderezhkin, Vladimir2  Danielius, Romualdas1  Razjivin, Andrei3  | |
[1] Physical Faculty, Vilnius University, Vilnius, Lithuania;Scientific Research Center on Technological Lasers, Russian Academy of Science, Troizk, Moscow Region, Russian Federation;International Laser Center, Moscow State University, Moscow, Russian Federation | |
关键词: Exciton interaction; Pseudolocal librational mode; Bacterial photosynthesis; Light-harvesting antenna; BChl; bacteriochlorophyll; R rubrum; Rhodospirillum rubrum.; | |
DOI : 10.1016/0014-5793(94)00428-5 | |
学科分类:生物化学/生物物理 | |
来源: John Wiley & Sons Ltd. | |
【 摘 要 】
The influence of exciton interactions and pseudolocal librational modes on the relaxation of photo-induced absorption changes of the light-harvesting antenna of the photosynthetic purple bacterium, Rhodospirillum rubrum, was studied in the ps time domain. A hypothesis is put forward that the long-lived librational modes can occur in the circular aggregate of light-harvesting bacteriochlorophyll molecules of the core antenna. The model spectra obtained quantitatively fit the shape of the photo-induced picosecond absorbance difference spectra. The model predicts the decay of photo-induced spectra with the time constant within tens of picoseconds.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO201912020299567ZK.pdf | 362KB | download |