Ultrafast initial reaction in bacterial photosynthesis revealed by femtosecond infrared spectroscopy

Journal Article · Thu Sep 07 00:00:00 EDT 1995 · Journal of Physical Chemistry

DOI:https://doi.org/10.1021/j100036a034· OSTI ID:106775

Hamm, P; Zinth, W ^[1]

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1. Ludwig Maximilians Universitaet, Muenchen (Germany)

The early temporal evolution of the transient infrared difference spectrum of bacterial reaction centers of Rhodobacter sphaeroides between 1000 and 1600 cm{sup -1} reveals a strong 200 fs component which has not yet been detected in femtosecond experiments in the visible or near infrared region. A detailed analysis of the experimental data shows that this fast component can be explained by a considerable change of the electronic structure of the primary electron donor, the special pair, during this time. A possible explanation of the reaction relates this process with an ultrafast initial intramolecular charge separation in the special pair P. 40 refs., 6 figs.

• Sponsoring Organization: USDOE
• OSTI ID: 106775
• Journal Information: Journal of Physical Chemistry, Vol. 99, Issue 36; Other Information: PBD: 7 Sep 1995
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
66 PHYSICS
55 BIOLOGY AND MEDICINE
BASIC STUDIES
ORGANIC COMPOUNDS
PHOTOCHEMICAL REACTIONS
INFRARED SPECTRA
PHOTOSYNTHETIC REACTION CENTERS
ELECTRON TRANSFER
SPECTROSCOPY
USES
BACTERIA
ELECTRONIC STRUCTURE
CHEMICAL REACTION KINETICS
ENERGY LEVELS