Time-resolved photoelectron spectroscopy of solvated electrons in aqueous NaI solution.

Citation data:

Physical chemistry chemical physics : PCCP, ISSN: 1463-9084, Vol: 12, Issue: 43, Page: 14629-34

Publication Year:
2010
Usage 18
Abstract Views 18
Captures 3
Readers 3
Citations 72
Citation Indexes 72
Repository URL:
http://scholarworks.unist.ac.kr/handle/201301/6236
PMID:
20886131
DOI:
10.1039/c0cp00847h
Author(s):
Luebcke, Andrea; Buchner, Franziska; Heine, Nadja; Hertel, Ingolf V.; Schultz, Thomas
Publisher(s):
Royal Society of Chemistry (RSC); The Royal Society of Chemistry; ROYAL SOC CHEMISTRY
Tags:
Physics and Astronomy; Chemistry; EUV SYNCHROTRON-RADIATION; HYDRATED ELECTRON; LIQUID WATER; FEMTOSECOND DYNAMICS; RELAXATION DYNAMICS; ULTRAFAST DYNAMICS; EXCESS ELECTRONS; PHOTODETACHMENT; CLUSTERS; ANION
article description
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 occurring 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.