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Issue 37, 2016
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Direct simulation of electron transfer in the cobalt hexammine(II/III) self-exchange reaction

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Abstract

We present an atomistic simulation of the cobalt hexammine(II/III) self-exchange reaction using path integral (PI) methods. We construct a simple force field for the system in its reactant state that includes parameters for both atom–atom interactions, and interactions with an explicit transferring electron represented in the PI framework. We then calculate the outer sphere free energy barrier due to solvent reorganization from a PI molecular dynamics simulation and we obtain the dynamic transmission coefficient using ring polymer molecular dynamics. Combining these calculated values with literature values for the inner sphere reorganization energy, we obtain a reaction rate in good agreement with experimental measurements. The protocol introduced here circumvents the need for complex, system-specific force field parameterization along an assumed reaction coordinate making it sufficiently accurate, efficient, and broadly applicable to the study of both adiabatic and nonadiabatic charge transfer reactions in transition metal complexes.

Graphical abstract: Direct simulation of electron transfer in the cobalt hexammine(ii/iii) self-exchange reaction

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Publication details

The article was received on 13 Jul 2016, accepted on 31 Aug 2016 and first published on 31 Aug 2016


Article type: Paper
DOI: 10.1039/C6CP04882J
Citation: Phys. Chem. Chem. Phys., 2016,18, 26117-26124
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    Direct simulation of electron transfer in the cobalt hexammine(II/III) self-exchange reaction

    R. L. Kenion and N. Ananth, Phys. Chem. Chem. Phys., 2016, 18, 26117
    DOI: 10.1039/C6CP04882J

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