Femtosecond Dynamics Within the B820 Dimeric Subunit from the Core Antenna Complex of Rs. rubrum

  • R. Kumble
  • S. Palese
  • R. W. Visschers
  • P. L. Dutton
  • R. M. Hochstrasser
Conference paper
Part of the Springer Series in Chemical Physics book series (CHEMICAL, volume 62)

Abstract

Femtosecond pump-probe measurements at room temperature reveal coherent nuclear motion and ultrafast depolarization within the dimeric subunit of a bacterial light-harvesting complex, and spectral evolution within the re-assembled aggregate. The results establish a sub-50 fs timescale for dephasing between dimer exciton levels and support a stochastic hopping model for energy transfer within antenna complexes.

Keywords

Migration Anisotropy Coherence Oligomer Polypeptide 

References

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    Van Grondelle, R.; Dekker, J. P.; Gillbro, T.; Sundstrom, V. Biochim. Biophys. Acta 1994, 1187, 1Google Scholar
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    Wynne, K.; Hochstrasser, R. M. J. Raman Spectrosc. 1995, 26, 561.CrossRefADSGoogle Scholar
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    Bradforth, S. E.; Jimenez, R.; van Mourik, F.; van Grondelle, R.; Fleming, G. R. J. Phys. Chem. 1995, 99, 16179.CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1996

Authors and Affiliations

  • R. Kumble
    • 1
  • S. Palese
    • 1
  • R. W. Visschers
    • 2
  • P. L. Dutton
    • 2
  • R. M. Hochstrasser
    • 1
  1. 1.Department of ChemistryUniversity of PennsylvaniaPhiladelphiaUSA
  2. 2.The Johnson Foundation for Molecular BiophysicsUniversity of PennsylvaniaPhiladelphiaUSA

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