Peculiarities and paradoxes of photoinduced electron transfer reactions |
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Authors: | M G Kuzmin I V Soboleva E V Dolotova D N Dogadkin |
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Institution: | 1.High Energy Chemistry Research and Education Center, Faculty of Chemistry,Moscow State University,Moscow,Russia |
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Abstract: | Many chemical reactions involve the electron transfer stage. The kinetics of photoinduced electron transfer reactions is commonly
considered in terms of either the transition state theory as preliminary thermally activated reorganization of the medium
and reactants (necessary for degeneracy of the electronic levels of the reactants and the products) or nonradiative quantum
transitions, which do not require preliminary activation and are observed in the exoergic region. A new approach to the kinetics
of such reactions that has been proposed recently considers a substantial reduction of the barrier in the contact reactant
pair due to strong electronic interaction and takes into account the intermediate formation of a charge transfer complex.
This approach has explained many well-known important features of electron transfer reactions that are inconsistent with the
first two theories. |
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