Temperature dependent relaxation and recombination dynamics of the hydrated electron
- 15 July 2000
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 113 (3), 1126-1134
- https://doi.org/10.1063/1.481891
Abstract
The ultrafast solvation and recombination dynamics of the hydrated electron generated by two-photon ionization of water at 4.65 eV is studied by transient absorption spectroscopy as a function of temperature in the range from 277 K to 355 K. The part of the spectral blue shift which is observed in the absorption spectrum of the hydrated electron after 1 ps is purely continuous and is accurately described by the well known analytical expression for the temperature dependent absorption spectrum of the ground state hydrated electron. This indicates that thermal relaxation or more likely solvation of the hydrated electron predominantly causes the blue shift. The survival probability of the hydrated electron shows a strong temperature dependence, which is satisfactory explained by the temperature dependent mobility and reaction rates of the species involved in the recombination. This implies that the average initial separation between the hydrated electron and the ionization site of 〈r0〉=1.0±0.1 nm does not depend significantly on the bulk water temperature.Keywords
This publication has 48 references indexed in Scilit:
- Two-photon dissociation and ionization of liquid water studied by femtosecond transient absorption spectroscopyThe Journal of Chemical Physics, 1999
- Multiphoton Ionization of Liquid Water with 3.0−5.0 eV PhotonsThe Journal of Physical Chemistry, 1996
- On the electronic structure of liquid water: Conduction-band tail revealed by photoionization dataChemical Physics Letters, 1990
- Hydrogen/deuterium isotope effects in water radiolysis. 2. Dissociation of electronically excited waterThe Journal of Physical Chemistry, 1990
- Femtosecond studies of electron photodetachment of simple ions in liquid water: Solvation and geminate recombination dynamicsThe Journal of Chemical Physics, 1989
- Two-photon ionization and dissociation of liquid water by powerful laser UV radiationChemical Physics, 1983
- Production of hydrated electrons by flash photolysis of liquid water with light in the first continuumThe Journal of Physical Chemistry, 1969
- Photolysis of Liquid Water at 1849 ÅThe Journal of Chemical Physics, 1966
- Absorption Spectra in Irradiated Water and Some Solutions: Absorption Spectra of ‘Hydrated’ ElectronNature, 1963
- Absorption Spectrum of the Hydrated Electron in Water and in Aqueous SolutionsJournal of the American Chemical Society, 1962