Table of Contents
Laser Chemistry
Volume 19 (1999), Issue 1-4, Pages 161-164

Pump Probe Anisotropy Studies of the Photosynthetic Reaction Center

1Department of Chemistry, USA
2Department of Biochemistry and Biophysics and Johnson Foundation, University of Pennsylvania, Philadelphia 19104, PA, USA
3Department of Chemistry, the James Franck Institute, University of Chicago, Chicago 60637, IL, USA
4Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland WA 99352, USA

Received 8 April 1997

Copyright © 1999 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


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, Py+ and Py- 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).