On spin-exchange and electron-transfer rates in bacterial photosynthesis.
A discrepancy is explored regarding the spin exchange integral estimated from magnetic field effects on recombination of the bacteriochlorophyll dimer cation (Bchl)(2)+ and the bacteriopheophytin anion Bph(-) and the measured electron transfer rate between Bph and electronically excited (Bchl)(2). In one explanation considered here there are two sites for the electron or for the hole, with a hopping between sites.
Institut für Physikalische und Theoretische Chemie, Technische Universität Munchen, D-8046 Garching, West Germany.
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Haberkorn
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Michel-Beyerle
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Marcus