Abstract
The solvated electron yield in neat ethylene glycol (1,2-ethanediol), measured using pulse radiolysis, is G (esolv-)10ns=(1.7+/-0.2)x10{sup -7}molJ{sup -1}. The rate constant of the reaction of solvated electrons with silver cations is k (esolv-+Ag+)=(2.8+/-0.1)x10{sup 9}dm{sup 3}mol{sup -1}s{sup -1} and the absorption band maximum of Ag{sup 0} is at 350nm. The surface plasmon band of the silver clusters appears slowly at around 400nm with a coalescence cascade rate constant of 2x10{sup 6}dm{sup 3}mol{sup -1}s{sup -1}. The free silver ions do not scavenge ethylene glycol radicals.In contrast, the {gamma}-radiolysis reduction yield of Ag{sup +} into clusters is dose-dependent, changing from G{sub i}(Ag{sub n})=(2.5+/-0.5)x10{sup -7}molJ{sup -1} at low dose to G{sub max}(Ag{sub n})=(7.5+/-0.5)x10{sup -7}molJ{sup -1} at higher doses, when clusters accumulate. Silver cations adsorbed on clusters are able to scavenge the ethylene glycol radicals, which also contribute to their reduction for a part of G{sub rad}=(5.8+/-0.5)x10{sup -7}molJ{sup -1}. Considering the different ways the reducing radicals can be produced, it is concluded that they originate from the electron-cation recombination and from the cation-ethylene glycol reaction, but that the dissociation of excited states is a negligible path. The formation mechanisms of the radicals and the rate constants in ethylene glycol are compared with those in water
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Soroushian, Behrouz;
[1]
Lampre, Isabelle;
[1]
Belloni, Jacqueline;
[1]
Mostafavi, Mehran
[1]
- Laboratoire de Chimie Physique, UMR CNRS-UPS 8000, Universite Paris-Sud, ELYSE, Bat. 349, 91405 Orsay Cedex (France)
Citation Formats
Soroushian, Behrouz, Lampre, Isabelle, Belloni, Jacqueline, and Mostafavi, Mehran.
Radiolysis of silver ion solutions in ethylene glycol: solvated electron and radical scavenging yields.
United Kingdom: N. p.,
2005.
Web.
doi:10.1016/j.radphyschem.2004.02.009.
Soroushian, Behrouz, Lampre, Isabelle, Belloni, Jacqueline, & Mostafavi, Mehran.
Radiolysis of silver ion solutions in ethylene glycol: solvated electron and radical scavenging yields.
United Kingdom.
https://doi.org/10.1016/j.radphyschem.2004.02.009
Soroushian, Behrouz, Lampre, Isabelle, Belloni, Jacqueline, and Mostafavi, Mehran.
2005.
"Radiolysis of silver ion solutions in ethylene glycol: solvated electron and radical scavenging yields."
United Kingdom.
https://doi.org/10.1016/j.radphyschem.2004.02.009.
@misc{etde_20620229,
title = {Radiolysis of silver ion solutions in ethylene glycol: solvated electron and radical scavenging yields}
author = {Soroushian, Behrouz, Lampre, Isabelle, Belloni, Jacqueline, and Mostafavi, Mehran}
abstractNote = {The solvated electron yield in neat ethylene glycol (1,2-ethanediol), measured using pulse radiolysis, is G (esolv-)10ns=(1.7+/-0.2)x10{sup -7}molJ{sup -1}. The rate constant of the reaction of solvated electrons with silver cations is k (esolv-+Ag+)=(2.8+/-0.1)x10{sup 9}dm{sup 3}mol{sup -1}s{sup -1} and the absorption band maximum of Ag{sup 0} is at 350nm. The surface plasmon band of the silver clusters appears slowly at around 400nm with a coalescence cascade rate constant of 2x10{sup 6}dm{sup 3}mol{sup -1}s{sup -1}. The free silver ions do not scavenge ethylene glycol radicals.In contrast, the {gamma}-radiolysis reduction yield of Ag{sup +} into clusters is dose-dependent, changing from G{sub i}(Ag{sub n})=(2.5+/-0.5)x10{sup -7}molJ{sup -1} at low dose to G{sub max}(Ag{sub n})=(7.5+/-0.5)x10{sup -7}molJ{sup -1} at higher doses, when clusters accumulate. Silver cations adsorbed on clusters are able to scavenge the ethylene glycol radicals, which also contribute to their reduction for a part of G{sub rad}=(5.8+/-0.5)x10{sup -7}molJ{sup -1}. Considering the different ways the reducing radicals can be produced, it is concluded that they originate from the electron-cation recombination and from the cation-ethylene glycol reaction, but that the dissociation of excited states is a negligible path. The formation mechanisms of the radicals and the rate constants in ethylene glycol are compared with those in water and methanol.}
doi = {10.1016/j.radphyschem.2004.02.009}
journal = []
issue = {2-3}
volume = {72}
journal type = {AC}
place = {United Kingdom}
year = {2005}
month = {Feb}
}
title = {Radiolysis of silver ion solutions in ethylene glycol: solvated electron and radical scavenging yields}
author = {Soroushian, Behrouz, Lampre, Isabelle, Belloni, Jacqueline, and Mostafavi, Mehran}
abstractNote = {The solvated electron yield in neat ethylene glycol (1,2-ethanediol), measured using pulse radiolysis, is G (esolv-)10ns=(1.7+/-0.2)x10{sup -7}molJ{sup -1}. The rate constant of the reaction of solvated electrons with silver cations is k (esolv-+Ag+)=(2.8+/-0.1)x10{sup 9}dm{sup 3}mol{sup -1}s{sup -1} and the absorption band maximum of Ag{sup 0} is at 350nm. The surface plasmon band of the silver clusters appears slowly at around 400nm with a coalescence cascade rate constant of 2x10{sup 6}dm{sup 3}mol{sup -1}s{sup -1}. The free silver ions do not scavenge ethylene glycol radicals.In contrast, the {gamma}-radiolysis reduction yield of Ag{sup +} into clusters is dose-dependent, changing from G{sub i}(Ag{sub n})=(2.5+/-0.5)x10{sup -7}molJ{sup -1} at low dose to G{sub max}(Ag{sub n})=(7.5+/-0.5)x10{sup -7}molJ{sup -1} at higher doses, when clusters accumulate. Silver cations adsorbed on clusters are able to scavenge the ethylene glycol radicals, which also contribute to their reduction for a part of G{sub rad}=(5.8+/-0.5)x10{sup -7}molJ{sup -1}. Considering the different ways the reducing radicals can be produced, it is concluded that they originate from the electron-cation recombination and from the cation-ethylene glycol reaction, but that the dissociation of excited states is a negligible path. The formation mechanisms of the radicals and the rate constants in ethylene glycol are compared with those in water and methanol.}
doi = {10.1016/j.radphyschem.2004.02.009}
journal = []
issue = {2-3}
volume = {72}
journal type = {AC}
place = {United Kingdom}
year = {2005}
month = {Feb}
}