Time-resolved charge transfer in "push-pull" stilbenes

J. Oberle (1) , Emmanuel Abraham (1) , Gediminas Jonusauskas (1) , R. Lapouyade (2) , C. Rulliere (1)

1 CPMOH - Centre de physique moléculaire optique et hertzienne
2 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

Intramolecular Charge Transfer (ICT) processes of 4-dimethylamino-4′-nitrostilbene (DNS) in solution are studied by pump-probe absorption spectroscopy with a 100 fs time resolution. The results are compared to transient CARS experiments. Pump-probe results confirm the formation of a radiative ICT state in low polar solvents. In a highly polar solvent (acetonitrile), the formation of a short-lived non-radiative ICT state is observed for the first time. CARS experiments support structural changes associated to ICT processes in highly polar solvents.

Domaines: Physique [physics]

J. Oberle, Emmanuel Abraham, Gediminas Jonusauskas, R. Lapouyade, C. Rulliere. Time-resolved charge transfer in "push-pull" stilbenes. 10th International Conference on Time-Resolved Vibrational Spectroscopy (TRVS 2001), May 2001, Okazzaki, Japan. Bulletin of the Chemical Society of Japan, 75 (5), pp.1041-1047, 2002, ⟨10.1246/bcsj.75.1041⟩. ⟨hal-01550664⟩