Volume 19, Issue 1-4 047101 pp. 161-164
Article
Open Access

Pump Probe Anisotropy Studies of the Photosynthetic Reaction Center

D. C. Arnett

D. C. Arnett

Department of Chemistry, USA

Environmental Molecular Sciences Laboratory Pacific Northwest National Laboratory Richland WA 99352, USA , pnl.gov

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C. C. Moser

C. C. Moser

Department of Biochemistry and Biophysics and Johnson Foundation University of Pennsylvania Philadelphia, PA 19104, USA , upenn.edu

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P. L. Dutton

P. L. Dutton

Department of Biochemistry and Biophysics and Johnson Foundation University of Pennsylvania Philadelphia, PA 19104, USA , upenn.edu

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N. F. Scherer

N. F. Scherer

Department of Chemistry the James Franck Institute University of Chicago Chicago , IL 60637, USA , uchicago.edu

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First published: 01 January 1999

Abstract

The photosynthetic reaction center of Rb. sphaeroides is investigated by unique pump-probe anisotropy methods using 13 fs optical pulses tunable throughout the near IR absorption band. The time and wavelength resolved pump probe anisotropy transients yield detailed experimental descriptions of the energy levels, and of the excitonically coupled special pair (P), and dynamics prior to charge separation, particularly energy transfer from the accessory bacteriochlorophylla′s (B) to the special pair (P).

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