The question of the intermediate state P+Chl‐in bacterial photosynthesis
- 3 June 1985
- journal article
- Published by Wiley in FEBS Letters
- Vol. 185 (1) , 76-82
- https://doi.org/10.1016/0014-5793(85)80744-4
Abstract
In bacterial photosynthesis it has been proposed that an electron is transferred from the excited singlet state (P∗) of theprimary electron donor first to a bacteriochlorophyll (BChl) molecule, generating a P+Chl charge‐transfer state, and that BChl‐subsequently (4–7 ps) transfers an electron to a bacteriopheophytin molecule. Here we review the evidence for and against the intermediacy of P+BChl‐and present picosecond transient absorption and kinetic data that bear on this point. We conclude that there is no convincing evidence that P+BChl is a kinetically or spectrally resolved intermediary state in the charge separation process.Keywords
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