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Updated: Aug 30, 2026

Electrochemical Detection of Deuterium Kinetic Isotope Effect on Extracellular Electron Transport in Shewanella oneidensis MR-1
Published on: April 16, 2018
Evidence for diffusion-controlled electron transfer in exciplex formation reactions. Medium reorganisation stimulated
Michael G Kuzmin1, Irina V Soboleva, Elena V Dolotova
1Department of Chemistry, Moscow M. V. Lomonosov University, 119992 Moscow, Russia. kuzmin@photo.chem.msu.ru
Abstract:
Diffusion-controlled rates of formation were found from the temperature dependence of apparent quenching rate constants for exciplexes, when the driving force of excited-state electron transfer -0.1 < deltaG(ET)* < +0.1 eV. This is inconsistent with the conventional mechanism of electron-transfer reactions, involving preliminary reorganisation of the medium and reactants, and provides strong support for the mechanism of medium reorganisation stimulated by strong electronic coupling of locally excited and charge-transfer states.
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