Energy migration in the light-harvesting antenna of the photosynthetic bacterium Rhodospirillum rubrum studied by time-resolved excitation annihilation at 77 K.

@article{Valkunas1996EnergyMI,
  title={Energy migration in the light-harvesting antenna of the photosynthetic bacterium Rhodospirillum rubrum studied by time-resolved excitation annihilation at 77 K.},
  author={Leonas Valkunas and Eva {\AA}kesson and T{\~o}nu Pullerits and Villy Sundstr{\"o}m},
  journal={Biophysical journal},
  year={1996},
  volume={70 5},
  pages={2373-9}
}
The intensity dependence of picosecond kinetics in the light-harvesting antenna of the photosynthetic bacterium Rhodospirillum rubrum is studied at 77 K. By changing either the average excitation intensity or the pulse intensity we have been able to discriminate singlet-singlet and singlet-triplet annihilation. It is shown that the kinetics of both annihilation types are well characterized by the concept of percolative excitation dynamics leading to the time-dependent annihilation rates. The… CONTINUE READING

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