The question of the intermediate state P + Chl - in bacterial photosynthesis

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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. © 1985.

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Kirmaier, C., Holten, D., & Parson, W. W. (1985). The question of the intermediate state P + Chl - in bacterial photosynthesis. FEBS Letters, 185(1), 76–82. https://doi.org/10.1016/0014-5793(85)80744-4

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