fr
Article scientifique
Anglais

Ultrafast Nonequilibrium Charge Recombination Dynamics of Excited Donor-Acceptor Complexes

Contributeurs/tricesNicolet, Olivier; Vauthey, Ericorcid
Publié dansThe journal of physical chemistry. A, vol. 106, no. 23, p. 5553-5562
Date de publication2002
Résumé

The dynamics of charge recombination (CR) of excited donor−acceptor complexes composed of methoxy-substituted benzenes and pyromellitic dianhydride were investigated in four different solvents using both the multiplex transient grating and the transient absorption techniques. At constant driving force, the CR dynamics are substantially faster than those with methyl-substituted benzenes as donors. In acetonitrile (ACN), the CR time constant decreases from 3.5 ps with anisole down to 240 fs with tetramethoxybenzene. In valeronitrile, the CR is always slower than in ACN but is, in most cases, faster than diffusional solvation. The free energy, the solvent, and the temperature dependence of the CR dynamics can be qualitatively well reproduced using the hybrid model of Barbara and co-workers after incorporation of the contribution of inertial motion to solvation. The ability of this model to account for the absence of normal region at small driving force is also examined.

Groupe de recherche
Citation (format ISO)
NICOLET, Olivier, VAUTHEY, Eric. Ultrafast Nonequilibrium Charge Recombination Dynamics of Excited Donor-Acceptor Complexes. In: The journal of physical chemistry. A, 2002, vol. 106, n° 23, p. 5553–5562. doi: 10.1021/jp025542c
Identifiants
ISSN du journal1089-5639
490vues
0téléchargements

Informations techniques

Création21.09.2009 16:22:00
Première validation21.09.2009 16:22:00
Heure de mise à jour14.03.2023 15:13:58
Changement de statut14.03.2023 15:13:58
Dernière indexation15.01.2024 18:56:48
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack