Abstract
A theory of electron tunneling through a single-center bridge redox group that has two electronic levels participating in the electron transfer process is presented. The temperature is presumed to be low enough to ignore activation redox conversions of the bridge group. Salient features of this system are due both to the presence of two electroactive states of the bridge group and to relaxation processes along the reaction coordinate. The processes in question make the tunneling current time-dependent at fixed potentials and can bring about hysteresis in current-voltage curves when cycling the bias potential. Effects of inelastic tunneling with excitation of vibrations of a local quantum degree of freedom are considered.
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Original Russian Text © A.M. Kuznetsov, J. Ulstrup, 2006, published in Elektrokhimiya, 2006, Vol. 42, No. 7, pp. 845–852.
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Kuznetsov, A.M., Ulstrup, J. Theory of electron tunneling through a bridge molecule with two electronic levels at low temperatures. Russ J Electrochem 42, 760–766 (2006). https://doi.org/10.1134/S1023193506070093
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DOI: https://doi.org/10.1134/S1023193506070093