Femtosecond Dynamics Within the B820 Dimeric Subunit from the Core Antenna Complex of Rs. rubrum
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.
KeywordsTransient Absorption Antenna Complex Spectral Evolution Exciton Level Biphasic Decay
- Van Grondelle, R.; Dekker, J. P.; Gillbro, T.; Sundstrom, V. Biochim. Biophys. Acta 1994, 1187, 1Google Scholar