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Electron spin polarization in a three-electron spin system. An application to bacterial photosynthesis
Authors:AJ Hoff  PJ Hore
Institution:Biophysics Department, Huygens Laboratory, State University, Leiden, The Netherlands;Physical Chemistry Laboratory, State University, Groningen, The Netherlands
Abstract:Calculations on a system consisting of three electron spins and one nuclear spin are presented and their implications for bacterial photosynthesis discussed. Comparison with experimental measurements of electron spin polarization in pre-reduced photosynthetic reaction centres leads to conclusion that the exchange interaction within the primary radical pair is positive and less than 0.8 mT when the g values of the photoinduced radicals are taken to be those measured for the isolated radical species.
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