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Hydrated electron dynamics : from clusters to bulk.

Bragg, A. E. and Verlet, J. R. R. and Kammrath, A. and Cheshnovsky, O. and Neumark, D. M. (2004) 'Hydrated electron dynamics : from clusters to bulk.', Science., 306 (5696). pp. 669-671.

Abstract

The electronic relaxation dynamics of size-selected (H2O)n–/(D2O)n[25 n 50] clusters have been studied with time-resolved photoelectron imaging. The excess electron () was excited through the transition with an ultrafast laser pulse, with subsequent evolution of the excited state monitored with photodetachment and photoelectron imaging. All clusters exhibited p-state population decay with concomitant s-state repopulation (internal conversion) on time scales ranging from 180 to 130 femtoseconds for (H2O)n– and 400 to 225 femtoseconds for (D2O)n–; the lifetimes decrease with increasing cluster sizes. Our results support the "nonadiabatic relaxation" mechanism for the bulk hydrated electron (), which invokes a 50-femtosecond internal conversion lifetime.

Item Type:Article
Full text:Full text not available from this repository.
Publisher Web site:http://dx.doi.org/10.1126/science.1103527
Record Created:04 May 2007
Last Modified:08 Apr 2009 16:30

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