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Title

Ultrafast Nonequilibrium Charge Recombination Dynamics of Excited Donor-Acceptor Complexes
Authors
Nicolet, Olivier
Vauthey, Eric
Published in The journal of physical chemistry. A. 2002, vol. 106, no. 23, p. 5553-5562
Abstract 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.
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Structures
Faculté des sciences / Section de chimie et biochimie / Département de chimie physique
Research group Groupe Vauthey
Citation
(ISO format) 		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 https://archive-ouverte.unige.ch/unige:3228

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Deposited on : 2009-09-21

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