✦ LIBER ✦

Electron paramagnetic resonance of spin-correlated radical pairs in photosynthetic reactions

✍ Scribed by P.J. Hore; D.A. Hunter; C.D. McKie; A.J. Hoff

Publisher: Elsevier Science
Year: 1987
Tongue: English
Weight: 516 KB
Volume: 137
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(87)80617-6

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✦ Synopsis

Previous attempts to interpret the time-resolved electron paramagnetic resonance spectra of photosynthetic bacteria have been based on the premise that electron spin polarization arises in the primary radical pair (P+I-) formed by photoinduced charge separation. The observed spectrum is assumed to be the sum of the EPR spectra of P+ and X-, the radical produced from I-by electron transfer. Here it is argued that P+I-may be too short-lived to give rise to significant polarization and that the experimental spectrum is consistent with the rapid formation of a spin-correlated secondary radical pair.

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