Journal Article

FZJ-2018-07141

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Classical calculation of transient absorption spectra monitoring ultrafast electron transfer processes

Uspenskiy, I. ; Strodel, B.FZJ* ; Stock, G. (Corresponding author)

2006
Washington, DC

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Please use a persistent id in citations: doi:10.1021/ct6002127

Abstract: Classical formulations are considered that allow for the calculation of time- and frequency-resolved pump−probe spectra of nonadiabatically coupled molecular systems. When the semiclassical Franck−Condon approximation in the theoretical framework of the doorway-window formalism is employed, various first- and second-order expressions for the classical doorway and window functions are derived. Moreover, a classical analogue of the electronic dipole transition operator is employed. When established models describing ultrafast photoinduced electron transfer are adopted, it is found that the first-order approximations give rise to spurious structures of the time-resolved signal, which indicate that these approximations fail to correctly account for the averaging effect caused by finite pulses. The higher-order approximations, on the other hand, are shown to give a fairly accurate description of the transient absorption spectrum. By comparing to exact quantum-mechanical calculations, the merits and shortcomings of the various approaches as well as the generally achievable accuracy of a classical modeling of optical spectra is discussed.

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Contributing Institute(s):

1. Strukturbiochemie (ICS-6)

Research Program(s):

1. 551 - Functional Macromolecules and Complexes (POF3-551) (POF3-551)

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; IF >= 5 ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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