Excitation energy transfer in carotenoid-chlorophyll protein complexes probed by femtosecond fluorescence decays

Ultrafast Energy Relaxation and Excitation Delocalization in Excited States of Zinc Porphyrin Dimers and Trimer

“…The time-resolved fluorescence measurements were made with an up-conversion method [12,13] using a Ti:sapphire laser (Spectra Physics, Tsunami, 840 nm, 80 MHz) which was pumped with a diode-pumped solid state laser (Spectra Physics, Millennia X). The fundamental pulses are separated into two beams; the one is frequency-doubled by a BBO crystal (420 nm) and is used to excite the sample, and the other beam serves as a gate pulse.…”

Metallic Nanoparticles Coupled with Photosynthetic Complexes

“…Optical spectroscopy studies of both native and reconstituted PCP complexes have been carried out on the ensemble (Akimoto, 1996;Kleima, 2000;Krueger, 2001) and singlemolecule levels Wormke, 2007a;Wormke, 2008). Using transient absorption in femtosecond timescale main energy transfer pathways have been described, it has also been demonstrated that the two Chl a molecules interact relatively weakly with characteristic transfer time between them to be of the order to 12 ps (Kleima, 2000).…”

The structure and function of the LH2 (B800–850) complex from the purple photosynthetic bacterium Rhodopseudomonas acidophila strain 10050

“…In other antenna systems the balance between how much energy comes from S 2 and how much from S 1 will vary depending on which light-harvesting complex is being studied. Akimoto et al (1996) monitored the rate of energy transfer from the carotenoid (peridinin) to chlorophyll a in the water soluble peridinin-Chl a antenna complex from a dinoflagellate, Alexandrium cohorticula. This energy transfer process is ~100% efficient.…”