Study of the intramolecular charge-transfer (ICT) process in 4-dimethylamino-4 '-nitrostilbene by picosecond time-resolved CARS
Language
en
Article de revue
This item was published in
Journal of Raman Spectroscopy. 2000-04, vol. 31, n° 4, p. 311-317
Wiley
English Abstract
The intramolecular charge-transfer (ICT) process of 4-dimethylamino-4′-nitrostilbene (DNS) in solution was studied by pump–probe and transient CARS experiments with a 1 ps time resolution. Whereas pump–probe experiments ...Read more >
The intramolecular charge-transfer (ICT) process of 4-dimethylamino-4′-nitrostilbene (DNS) in solution was studied by pump–probe and transient CARS experiments with a 1 ps time resolution. Whereas pump–probe experiments give good evidence for the formation of an ICT state in polar solvents, CARS experiments support structural changes associated with the ICT process. In acetonitrile, a 37 cm−1 downshift of the NO2 stretching mode can be explained by a structural change located on the acceptor NO2 group and assigned to conformational relaxation of the ICT state. In toluene, such behavior is not observed correlated with the absence of ICT state stabilization in non-polar solvents.Read less <
Origin
Hal imported