On the Energetics of the States 1P*, 3P* and P+H in Reaction Centers of Rb. sphaeroides

  • A. Ogrodnik
  • M. Volk
  • M. E. Michel-Beyerle
Part of the NATO ASI Series book series (NSSA, volume 149)


Magnetic field dependent recombination measurements together with magnetic field dependent triplet lifetimes [Chidsey et al. (1985), Proc. Natl. Acad. Sci USA 82, 6850] allowed the determination of the free energy change ΔG(P+H3P*) = 0.15–0.16 eV between 185K–290K. This value being (almost) temperature independent indicates ΔG(P+H3P*) ≃ ΔH(P+H3P*) and is consistent with ΔG(1P*−P+H) and ΔH(1P*−3P*) from previous delayed fluorescence and phosporescence data implying ΔG ≃ ΔH for all combinations of these states.


Magnetic Field Dependence Free Energy Difference Delay Fluorescence Radical Pair Mechanism Nuclear Spin Relaxation 
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Copyright information

© Springer Science+Business Media New York 1988

Authors and Affiliations

  • A. Ogrodnik
    • 1
  • M. Volk
    • 1
  • M. E. Michel-Beyerle
    • 1
  1. 1.Institut für Physikalische und Theoretische ChemieTechnische Universität MünchenGarchingGermany

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