Models for Proton-Coupled Electron Transfer in Photosystem II

  title={Models for Proton-Coupled Electron Transfer in Photosystem II},
  author={J. M. Mayer and Ian J. Rhile and F. B. Larsen and Elizabeth A. Mader and Todd F Markle and A. DiPasquale},
  journal={Photosynthesis Research},
The coupling of proton and electron transfers is a key part of the chemistry of photosynthesis. The oxidative side of photosystem II (PS II) in particular seems to involve a number of proton-coupled electron transfer (PCET) steps in the S-state transitions. This mini-review presents an overview of recent studies of PCET model systems in the authors' laboratory. PCET is defined as a chemical reaction involving concerted transfer of one electron and one proton. These are thus distinguished from… Expand
Dependence of reaction rates for bidirectional PCET on the electron donor-electron acceptor distance in phenol-Ru(2,2'-bipyridine)₃²⁺ dyads.
A homologous series of three donor-bridge-acceptor molecules in which a phenolic unit is attached covalently to a Ru(bpy)3(2+) (bpy =2,2'-bipyridine) complex via rigid rod-like p-xylene spacers was investigated, finding that electron and proton release by the phenol occur in concert. Expand
Kinetic isotope effect of proton-coupled electron transfer in a hydrogen bonded phenol-pyrrolidino[60]fullerene.
  • J. Ravensbergen, C. Brown, +6 authors J. Kennis
  • Chemistry, Medicine
  • Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology
  • 2015
A spectroscopy study on a phenol-pyrrolidino[60]fullerene reveals a kinetic isotope effect (KIE) of 3.0, consistent with a concerted PCET mechanism. Expand
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