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 language | English |
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Pages (from-to) | 477-483 |
Number of pages | 7 |
Journal | European Biophysics Journal |
Volume | 26 |
Issue number | 6 |
DOIs | |
State | Published - 1997 |
Keywords
- Double excited states
- Electron transfer
- Fission
- Photosynthesis