Charge separation in photosynthesis via a spin exchange coupling mechanism

Sighart F. Fischer, P. O.J. Scherer

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

A new mechanism for the primary photoinduced charge separation in photosynthesis is proposed. It involves as a real intermediate between the excited special pair state P* and the primary charge separated state P+ H(L)/a trip-trip-singlet B(T) B(L)/(T), which consists of a triplet on the dimer P and a further triplet on the monomer B(L). Both combine to a singlet. The electron transfer is caused by spin exchange couplings. The transient spectrum of the short lived intermediate, formerly taken as evidence for the charge transfer state P+ B(L)/-, is reinterpreted as a transient excitation of this trip-trip singlet.

Original languageEnglish
Pages (from-to)477-483
Number of pages7
JournalEuropean Biophysics Journal
Volume26
Issue number6
DOIs
StatePublished - 1997

Keywords

  • Double excited states
  • Electron transfer
  • Fission
  • Photosynthesis

Fingerprint

Dive into the research topics of 'Charge separation in photosynthesis via a spin exchange coupling mechanism'. Together they form a unique fingerprint.

Cite this