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Proceedings Paper

Temperature dependent solvation dynamics of electrons after one-photon detachment in aqueous iodide
Author(s): H. Iglev; A. Trifonov; I. Buchvarov; T. Fiebig; A. Laubereau
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Paper Abstract

The electron photodetachment from 2.5~mM aqueous iodide solution is studied in the temperature range 25 to 75°C. The dynamics following excitation of the anion at 242~nm into the lowest CTTS state are studied in the spectral range of 400-1000~nm. A first intermediate is observed that builds up with a time constant of 220 to 180~fs in the investigated temperature interval and is assigned to an iodine:electron pair in a transient solvent configuration. Subsequent solvent reorganization leads to a quasi-equilibrated hydrated atom:electron pair (I:e-)hyd. The latter builds up with a time constant of 700 to 540~fs going from 25°C to 75°C. The following relaxation seems to be governed by partially diffusion-controlled recombination of the electron in the presence of an attraction potential well with depth of about 850~cm-1. The experimental result for the lifetime of the hydrated I:e- pair is 21 to 16~ps going from 25°C to 75°C.

Paper Details

Date Published: 3 June 2005
PDF: 9 pages
Proc. SPIE 5826, Opto-Ireland 2005: Optical Sensing and Spectroscopy, (3 June 2005); doi: 10.1117/12.605137
Show Author Affiliations
H. Iglev, Technische Univ. Muenchen (Germany)
A. Trifonov, Boston College (United States)
I. Buchvarov, Univ. of Sofia (Bulgaria)
T. Fiebig, Boston College (United States)
A. Laubereau, Technische Univ. Muenchen (Germany)

Published in SPIE Proceedings Vol. 5826:
Opto-Ireland 2005: Optical Sensing and Spectroscopy
Gerard D. O'Sullivan; Brian D. MacCraith; Hugh James Byrne; Enda McGlynn; Alan G. Ryder, Editor(s)

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