UNIGE document Scientific Article
previous document  unige:2982  next document
add to browser collection
Title

Picosecond Polarization Grating Study of the Effect of Excess Excitation Energy on the Rotational Dynamics of Rhodamine 6G in Different Electronic States

Authors
Gumy, Jean-Claude
Published in Journal of Physical Chemistry. C. 1996, vol. 100, no. 21, p. 8628-8632
Abstract The effect of excess excitation energy on the rotational dynamics of rhodamine 6G in the ground and the first singlet excited state has been investigated in series of n-alcohols and alkanenitriles using the picosecond polarization grating technique. In nitriles, the reorientation times are the same for excitation at the S1 ← S0 and S2 ← S0 transitions, and no state dependence could be detected. In alcohols, the rotational dynamics of rhodamine 6G in the excited state is about 25% faster when formed with 1.15 eV excess excitation energy. This effect is ascribed to a decrease of the hydrodynamic volume due to dissociation of solute/solvent hydrogen bond following intramolecular vibrational redistribution. An accompanying perturbation of the solvent shell structure caused by the fast local temperature jump is not excluded.
Identifiers
Full text
Structures
Research group Groupe Vauthey
Citation
(ISO format)
GUMY, Jean-Claude, VAUTHEY, Eric. Picosecond Polarization Grating Study of the Effect of Excess Excitation Energy on the Rotational Dynamics of Rhodamine 6G in Different Electronic States. In: Journal of Physical Chemistry. C, 1996, vol. 100, n° 21, p. 8628-8632. https://archive-ouverte.unige.ch/unige:2982

204 hits

0 download

Update

Deposited on : 2009-09-21

Export document
Format :
Citation style :