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Issue 43, 2010
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Time-resolved photoelectron spectroscopy of solvated electrons in aqueous NaI solution

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Abstract

Time-resolved photoelectron spectroscopy was used to study the energetics and dynamics of solvated electrons in aqueous solution. Solvated electrons are generated by ultrafast photodetachment in a 100 mM aqueous NaI solution. Initially, an ensemble of strongly bound (“cold”) solvated electrons and an ensemble of weakly bound (“hot”) electrons in an unequilibrated solvent environment are observed. We report an ultrafast recombination channel for the “hot” electrons with a rate of (800 fs)−1 which is in competition with thermalization occuring with a rate of (1.1 ps)−1. The thermalized electrons recombine with the iodide radical with a rate of (22 ps)−1. About 35% of the thermalized electrons escape geminate recombination and form free, solvated electrons. The vertical detachment energy for the solvated electron is determined to be 3.40 eV. No indication for a surface-bound electron at lower binding energies was observed.

Graphical abstract: Time-resolved photoelectron spectroscopy of solvated electrons in aqueous NaI solution

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Publication details

The article was received on 10 Jun 2010, accepted on 03 Sep 2010 and first published on 30 Sep 2010


Article type: Paper
DOI: 10.1039/C0CP00847H
Citation: Phys. Chem. Chem. Phys., 2010,12, 14629-14634
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    Time-resolved photoelectron spectroscopy of solvated electrons in aqueous NaI solution

    A. Lübcke, F. Buchner, N. Heine, I. V. Hertel and T. Schultz, Phys. Chem. Chem. Phys., 2010, 12, 14629
    DOI: 10.1039/C0CP00847H

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