Rotational and vibrational dynamics in the excited electronic state of deprotonated and protonated fluorescein studied by time-resolved photofragmentation in an ion trap

Excited state dynamics of deprotonated and protonated fluorescein were investigated by polarization dependent femtosecond time-resolved pump-probe photofragmentation in a 3D ion trap. Transients of deprotonated fluorescein exhibit vibrational wavepacket dynamics with weak polarization dependence. Tr...

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Bibliographic Details
Published in:Structural dynamics (Melville, N.Y.) N.Y.), 2016-07, Vol.3 (4), p.043211-043211
Main Authors: Imanbaew, Dimitri, Gelin, Maxim F., Riehn, Christoph
Format: Article
Language:English
Subjects:
Anisotropy
Correlation
Density functional theory
Dynamic structural analysis
Electron states
Excitation
Fluorescein
Polarization
Rotational states
Time dependence
Wave packets
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Summary:Excited state dynamics of deprotonated and protonated fluorescein were investigated by polarization dependent femtosecond time-resolved pump-probe photofragmentation in a 3D ion trap. Transients of deprotonated fluorescein exhibit vibrational wavepacket dynamics with weak polarization dependence. Transients of protonated fluorescein show only effects of molecular alignment and rotational dephasing. The time resolved rotational anisotropy of protonated fluorescein is simulated by the calculated orientational correlation function. The observed differences between deprotonated and protonated fluorescein are ascribed to their different higher lying electronically excited states and corresponding structures. This is partially supported by time-dependent density functional theory calculations of the excited state structures.
ISSN:2329-7778
2329-7778
DOI:10.1063/1.4953367