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Nonequilibrium charge recombination from the excited adiabatic state of donor-acceptor complexes

Mikhailova, Valentina A.
Ivanov, Anatoly I.
Published in Journal of Chemical Physics. 2004, vol. 121, no. 13, p. 6463-6469
Abstract A model of nonequilibrium charge recombination from an excited adiabatic state of a donor-acceptor complex induced by the nonadiabatic interaction operator is considered. The decay of the excited state population prepared by a short laser pulse is shown to be highly nonexponential. The influence of the excitation pulse carrier frequency on the ultrafast charge recombination dynamics of excited donor-acceptor complexes is explored. The charge recombination rate constant is found to decrease with increasing excitation frequency. The variation of the excitation pulse carrier frequency within the charge transfer absorption band of the complex can alter the effective charge recombination rate by up to a factor 2. The magnitude of this spectral effect decreases strongly with increasing electronic coupling.
Keywords Excited statesIon recombinationCharge exchangeReaction rate constantsPhotoexcitationGround statesVibrational statesPerturbation theoryMolecule-photon collisions
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Research group Groupe Vauthey
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MIKHAILOVA, Valentina A., IVANOV, Anatoly I., VAUTHEY, Eric. Nonequilibrium charge recombination from the excited adiabatic state of donor-acceptor complexes. In: Journal of Chemical Physics, 2004, vol. 121, n° 13, p. 6463-6469. doi: 10.1063/1.1789940 https://archive-ouverte.unige.ch/unige:3255

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Deposited on : 2009-09-21

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