Ultrafast UV photon echo peak shift and fluorescence up conversion studies of non-polar solvation dynamics

The authors present photon echo peak shift and femtosecond fluorescence up-conversion studies of nonpolar solvation dynamics of a simple nonpolar dye p-terphenyl in EtOH and cyclohexane, using excitation in the UV range at 290 nm. The UV fluorescence up-conversion expts. were combined with a polychromatic detection and the results highlight the high sensitivity of this approach to fully characterize the excited state dynamics of the dye. The authors also demonstrate the feasibility of UV photon echo and transient grating and its sensitivity for the detection of nonpolar solvation dynamics by measuring the frequency correlation function of the dye in the ground state. While solvation dynamics in the picosecond regime is obsd. in EtOH, electronic coherence dephasing occurs on timescales faster than 100 fs in EtOH as well as in the nonpolar solvent cyclohexane.


Published in:
Chemical Physics, 350, 1-3, 104-110
Year:
2008
Keywords:
Note:
CAN 149:234229
73-5
Optical, Electron, and Mass Spectroscopy and Other Related Properties
Laboratoire de Spectroscopie Ultrarapide, ISIC, FSB,Ecole Polytechnique Federale de Lausanne,Lausanne,Switz.
Journal
0301-0104
written in English.
64-17-5 (Ethanol); 110-82-7 (Cyclohexane) Role: PRP (Properties) (solvent effect; ultrafast UV photon echo peak shift and fluorescence up conversion studies of non-polar solvation dynamics); 92-94-4 (p-Terphenyl) Role: PEP (Physical, engineering or chemical process), PRP (Properties), PROC (Process) (ultrafast UV photon echo peak shift and fluorescence up conversion studies of non-polar solvation dynamics)
Laboratories:




 Record created 2006-02-27, last modified 2018-03-17


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