Ultrafast energy transfer in chlorosomes from the green photosynthetic bacterium Chloroflexus aurantiacus
- Ames Lab., IA (United States)
- Arizona State Univ., Tempe, AZ (United States)
Energy transfers between the bacteriochlorophyll c and a antennae in light-harvesting chlorosomes from the green bacterium Chloroflexus aurantiacus have been studied in two-color pump-probe experiments with improved sensitivity and wavelength versatility. The BChl c {yields} BChl a energy transfers are well simulated with biexponential kinetics, with lifetimes of 2-3 and 11 ps. They do not exhibit an appreciable subpicosecond component. In the context of a kinetic model for chlorosomes, these lifetimes suggest that both internal BChl c processes and the BChl c {yields} BChl a energy-transfer step contribute materially to the empirical rod-to-baseplate energy-transfer kinetics. 11 refs., 2 figs., 1 tab.
- OSTI ID:
- 227710
- Journal Information:
- Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 9 Vol. 100; ISSN JPCHAX; ISSN 0022-3654
- Country of Publication:
- United States
- Language:
- English
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