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Tracking ultrafast excited-state bond-twisting motion in solution close to the Franck-Condon point

Dietzek, Benjamin LU ; Pascher, Torbjörn LU and Yartsev, Arkady LU (2007) In The Journal of Physical Chemistry Part B 111(21). p.6034-6041
Abstract
Applying optimal control to photoinduced trans-cis isomerization in condensed phase, the dynamics of bond-twisting motion of 1,1'-diethyl-4,4'-cyanine in methanol and propanol is revealed. The shape of the optimized pulse resulting from minimization of the photoisomer formation can be directly related to the initial excited-state dynamics in close proximity to the Franck-Condon point. The solvent viscosity-dependent ultrafast wavepacket motion is reflected in the prominent down-chirp of the optimized pulses and reveals a detailed picture of the control mechanism: The reduction of the isomer production is achieved by most efficient dumping of excited population back to the trans ground state. In the higher-viscosity solvent, propanol,... (More)
Applying optimal control to photoinduced trans-cis isomerization in condensed phase, the dynamics of bond-twisting motion of 1,1'-diethyl-4,4'-cyanine in methanol and propanol is revealed. The shape of the optimized pulse resulting from minimization of the photoisomer formation can be directly related to the initial excited-state dynamics in close proximity to the Franck-Condon point. The solvent viscosity-dependent ultrafast wavepacket motion is reflected in the prominent down-chirp of the optimized pulses and reveals a detailed picture of the control mechanism: The reduction of the isomer production is achieved by most efficient dumping of excited population back to the trans ground state. In the higher-viscosity solvent, propanol, wavelength-dependent oscillatory features are superimposed to the overall chirp structure pointing to the importance of excited-state vibrational coherences for the dumping process. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
The Journal of Physical Chemistry Part B
volume
111
issue
21
pages
6034 - 6041
publisher
The American Chemical Society
external identifiers
  • wos:000246695100030
  • scopus:34250319761
ISSN
1520-5207
DOI
10.1021/jp068652i
language
English
LU publication?
yes
id
49fd8d49-ab37-4fb0-a9d1-e6200c0f2243 (old id 663005)
date added to LUP
2007-12-10 14:40:07
date last changed
2017-09-10 04:40:56
@article{49fd8d49-ab37-4fb0-a9d1-e6200c0f2243,
  abstract     = {Applying optimal control to photoinduced trans-cis isomerization in condensed phase, the dynamics of bond-twisting motion of 1,1'-diethyl-4,4'-cyanine in methanol and propanol is revealed. The shape of the optimized pulse resulting from minimization of the photoisomer formation can be directly related to the initial excited-state dynamics in close proximity to the Franck-Condon point. The solvent viscosity-dependent ultrafast wavepacket motion is reflected in the prominent down-chirp of the optimized pulses and reveals a detailed picture of the control mechanism: The reduction of the isomer production is achieved by most efficient dumping of excited population back to the trans ground state. In the higher-viscosity solvent, propanol, wavelength-dependent oscillatory features are superimposed to the overall chirp structure pointing to the importance of excited-state vibrational coherences for the dumping process.},
  author       = {Dietzek, Benjamin and Pascher, Torbjörn and Yartsev, Arkady},
  issn         = {1520-5207},
  language     = {eng},
  number       = {21},
  pages        = {6034--6041},
  publisher    = {The American Chemical Society},
  series       = {The Journal of Physical Chemistry Part B},
  title        = {Tracking ultrafast excited-state bond-twisting motion in solution close to the Franck-Condon point},
  url          = {http://dx.doi.org/10.1021/jp068652i},
  volume       = {111},
  year         = {2007},
}