Concerted electron and proton transfer: Transition from nonadiabatic to adiabatic proton tunneling
10.1063/1.1323723
Crossref journal-article
AIP Publishing
The Journal of Chemical Physics (317)
Abstract

A concerted electron–proton transfer reaction is discussed, in which proton tunneling occurs simultaneously with electronic transition. It is assumed that the potential in which the proton moves is formed by two electronic states, which in the absence of their interaction would cross in the region between the two minima of the proton adiabatic potential. The proton tunneling between the two wells is, therefore, coupled to a switch between the two electronic states. The later occurs only when the proton is in the tunneling region under the barrier. A simple analytical expression for the tunneling matrix element TDA is derived, which is uniformly correct for small and large values of the electronic coupling. For small electronic coupling our expression coincides with that obtained in the nonadiabatic theory of proton-coupled electron transfer reactions. For large electronic coupling the expression is reduced to that obtained in the Born–Oppenheimer approximation. The transition from nonadiabatic to adiabatic tunneling is governed by the magnitude of the Landau–Zener parameter defined for the tunneling process. The obtained result is discussed in the context of the proton tunneling time.

Bibliography

Georgievskii, Y., & Stuchebrukhov, A. A. (2000). Concerted electron and proton transfer: Transition from nonadiabatic to adiabatic proton tunneling. The Journal of Chemical Physics, 113(23), 10438–10450.

Authors 2
  1. Yuri Georgievskii (first)
  2. Alexei A. Stuchebrukhov (additional)
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Dates
Type When
Created 23 years, 1 month ago (July 26, 2002, 9:59 a.m.)
Deposited 1 year, 6 months ago (Feb. 7, 2024, 4:46 p.m.)
Indexed 4 weeks, 1 day ago (Aug. 7, 2025, 4:27 p.m.)
Issued 24 years, 8 months ago (Dec. 15, 2000)
Published 24 years, 8 months ago (Dec. 15, 2000)
Published Print 24 years, 8 months ago (Dec. 15, 2000)
Funders 0

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@article{Georgievskii_2000, title={Concerted electron and proton transfer: Transition from nonadiabatic to adiabatic proton tunneling}, volume={113}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1323723}, DOI={10.1063/1.1323723}, number={23}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Georgievskii, Yuri and Stuchebrukhov, Alexei A.}, year={2000}, month=dec, pages={10438–10450} }