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RESEARCH PRODUCT
Excitation energy transfer in isolated chlorosomes from Chloroflexus aurantiacus
Viivi LehtovuoriJari MartiskainenJuha LinnantoJouko Korppi-tommolaRobertas Kananaviciussubject
biologyChemistryChloroflexus aurantiacusAnalytical chemistryGeneral Physics and AstronomyChlorosomebiology.organism_classificationMolecular physicsRodFemtosecondUltrafast laser spectroscopyPhotosynthetic bacteriaPhysical and Theoretical ChemistrySpectroscopyExcitationdescription
Abstract Chlorosomes from green photosynthetic bacteria Chloroflexus aurantiacus have been studied by time-resolved femtosecond transient absorption spectroscopy. The fastest kinetics of 200–300 fs resolved, was interpreted to stem for intra-chlorosomal excitation energy transfer. Energy transfer from the antenna to the baseplate appeared as a major 9.2 ps rise component detected at the baseplate probe wavelength. Excitation energy transfer rates were evaluated for a model chlorosome. Calculated rod to rod, and rods to baseplate rate constants of 200–400 fs and 10–20 ps, respectively, are in accord with the experimental results.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-07-01 | Chemical Physics Letters |