Polaron-exciton model for resonance energy transfer
Polaron-exciton model for resonance energy transfer
It is shown that Förster's expression for the electronic energy transfer rate can be recast in a form predicted for exciton motion that interacts strongly with molecular vibrations. Using a simple model based on the Kennard-Stepanov theory, Förster's expression for the spectral overlap is shown to be of a thermally activated form, as obtained previously by multiphonon theory. In contrast, the high-frequency internal vibrations contribute a factor which results from tunneling through a potential barrier between potential curves in the configuration coordinate diagram. We thus show that resonance energy transfer is equivalent to phonon-assisted hopping of a trapped excitonic polaron.
temperature-dependence, excitation transfer, complex molecules, electron-transfer, photosynthesis, fluorescence, absorption, transport, systems, spectra
6401-6405
Markvart, T.
f21e82ec-4e3b-4485-9f27-ffc0102fdf1c
Greef, R.
91063544-ed89-4738-b5f4-28a984bf5866
2004
Markvart, T.
f21e82ec-4e3b-4485-9f27-ffc0102fdf1c
Greef, R.
91063544-ed89-4738-b5f4-28a984bf5866
Markvart, T. and Greef, R.
(2004)
Polaron-exciton model for resonance energy transfer.
Journal of Chemical Physics, 121 (13), .
(doi:10.1063/1.1786575).
Abstract
It is shown that Förster's expression for the electronic energy transfer rate can be recast in a form predicted for exciton motion that interacts strongly with molecular vibrations. Using a simple model based on the Kennard-Stepanov theory, Förster's expression for the spectral overlap is shown to be of a thermally activated form, as obtained previously by multiphonon theory. In contrast, the high-frequency internal vibrations contribute a factor which results from tunneling through a potential barrier between potential curves in the configuration coordinate diagram. We thus show that resonance energy transfer is equivalent to phonon-assisted hopping of a trapped excitonic polaron.
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Published date: 2004
Keywords:
temperature-dependence, excitation transfer, complex molecules, electron-transfer, photosynthesis, fluorescence, absorption, transport, systems, spectra
Organisations:
Chemistry, Engineering Sciences
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Local EPrints ID: 22875
URI: http://eprints.soton.ac.uk/id/eprint/22875
ISSN: 0021-9606
PURE UUID: 5144b52e-1d78-408a-ad81-c685f0a9b108
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Date deposited: 09 Mar 2006
Last modified: 15 Mar 2024 06:41
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Author:
R. Greef
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