Coherent nuclear dynamics at room temperature in bacterial reaction centers.
Open accessAbstract
A room-temperature study is reported of the femtosecond spectral evolution of the stimulated emission band of the primary electron-transfer precursor P* in bacterial photosynthesis. The study was performed with membranes of the antenna-deficient RCO1 mutant of Rhodobacter sphaeroides. A time-dependent red shift, reflecting nuclear motion out of the Franck-Condon region of the excited state, is resolved. Analysis of oscillatory features persisting for > 1 ps in the kinetics revealed main frequencies of the activated motions at 30, 84, 145, and 192 cm-1. The oscillations occur on the time scale of primary electron transfer. Our results set a lower limit for the vibrational dephasing time in P* that is not compatible with the usual assumption in theoretical treatments of complete vibrational relaxation prior to electron transfer, even at room temperature.
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With the advent of femtosecond transient absorption spectroscopy in the early 1990s, long-lived vibrational coherences, lasting on the order of a picosecond, were detected for bacterial and plant light-harvesting complexes.
“With the advent of femtosecond transient absorption spectroscopy in the early 1990s, long-lived vibrational coherences, lasting on the order of a picosecond, were detected for bacterial and plant light-harvesting complexes [35 -40].”
From The future of quantum biology (2018) · cites this paper as [36]
Recent experiments with similar outcomes on humans support the same discrimination.
“(see [92] for recent experiments with similar outcomes on humans).”
From Vibrations, quanta and biology (2013) · cites this paper as [92]
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- Authors
- Vos, M. H., Jones, M. R., Hunter, C. N., Breton, J., & Martin, J. L.
- Affiliations
- École Polytechnique (FR)
- ORCID
- Venue
- Proceedings of the National Academy of Sciences
- Publisher
- National Academy of Sciences
- Published
- 1994-12-20
- Volume
- 91
- Issue
- 26
- Pages
- 12701-12705
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- PMC
- PMC45507
- OpenAlex
- W2010416571
- Cited by
- 112
- References
- 24
- Citations by year
- 2026: 1 · 2025: 3 · 2024: 5 · 2023: 1 · 2021: 1 · 2020: 4 · 2019: 1 · 2018: 7 · 2017: 4 · 2016: 5 · 2015: 4 · 2014: 5 · 2013: 6 · 2012: 2
- FWCI
- 4.16
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Proceedings of the National Academy of Sciences (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Wellcome Trust
- Topics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Spectroscopy and Quantum Chemical Studies
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Photosynthetic Processes and Mechanisms
- Physical Sciences › Chemistry › Physical and Theoretical Chemistry › Photochemistry and Electron Transfer Studies
- Keywords
- bacterial reaction center, Rhodobacter sphaeroides, stimulated emission, nuclear dynamics, vibrational dephasing, vibrational relaxation, Franck-Condon region, red shift, room temperature, primary electron transfer
- MeSH terms
- Bacteriochlorophylls, Biophysics, Electron Transport, Kinetics, Motion, Photosynthesis, Rhodobacter sphaeroides, Spectrum Analysis, Temperature, Biophysical Phenomena
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