Models for Proton-Coupled Electron Transfer in Photosystem II

@article{Mayer2006ModelsFP,
  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},
  year={2006},
  volume={87},
  pages={21-24}
}
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.
TLDR
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
TLDR
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
Energy Transfer with Semiconductor Quantum Dot Bioconjugates: A Versatile Platform for Biosensing, Energy Harvesting, and Other Developing Applications.
TLDR
This work discusses how QDs are steadily revolutionizing the development of new biosensors along with a myriad of other photonically active nanomaterial-based bioconjugates, and how this field has grown over a relatively short time span. Expand
Antioxidant and Cytoprotective Effects of Tibetan Tea and Its Phenolic Components
TLDR
It is concluded that LATT possesses antioxidative or cytoprotective properties, and these effects may mainly be attributed to the presence of phenolic components, including gallic acid and the four catechins. Expand