• Non-exponentiality in electron transfer kinetics: Static versus dynamic disorder models

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      https://www.ias.ac.in/article/fulltext/jcsc/109/06/0379-0388

    • Keywords

       

      Non-exponential dynamics; adiabatic surface; solvent reorganization energy

    • Abstract

       

      Non-exponential electron transfer kinetics in complex systems are often analyzed in terms of a quenched, static disorder model. In this work we present an alternative analysis in terms of a simple dynamic disorder model where the solvent is characterized by highly non-exponential dynamics. We consider both low and high barrier reactions. For the former, the main result is a simple analytical expression for the survival probability of the reactant. In this case, electron transfer, in the long time, is controlled by the solvent polarization relaxation—in agreement with the analyses of Rips and Jortner and of Nadler and Marcus. The short time dynamics is also non-exponential, but for different reasons. The high barrier reactions, on the other hand, show an interesting dynamic dependence on the electronic coupling element,Vel.

    • Author Affiliations

       

      Biman Bagchi1 2

      1. Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore - 560 012, India
      2. Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore
    • Dates

       
  • Journal of Chemical Sciences | News

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