Article
Direct observation of vibrational coherence in bacterial reaction centers using femtosecond absorption spectroscopy.
Proceedings of the National Academy of Sciences of the United States of America - 15 Oct 1991
Vos M H, Lambry J C, Robles S J, Youvan D C, Breton J, Martin J L
Abstract excerpt
It is shown that vibrational coherence modulates the femtosecond kinetics of stimulated emission and absorption of reaction centers of purple bacteria. In the DLL mutant of Rhodobacter capsulatus, which lacks the bacteriopheophytin electron acceptor, oscillations with periods of approximately 500 fs and possibly also of approximately 2 ps were observed, which are associated with formation of the excited state....
Topics
- Bacterial Chromatophores
- Freezing
- Kinetics
- Mutation
- Photosynthetic Reaction Center Complex Proteins
- Rhodobacter capsulatus
- Rhodobacter sphaeroides
- Spectrophotometry, Infrared
- Time Factors