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Title: Oxidation of aqueous polyselenide solutions. A mechanistic pulse radiolysis study

Abstract

The oxidation of aqueous polyselenide solutions was studied by pulse radiolysis in the presence of N{sub 2}O at pH 12.3; the hydroxyl radical OH was the predominant oxidant, while hydrogen selenide anions HSe{sup {minus}} and triselenide dianions Se{sub 3}{sup 2{minus}} were the major selenide species in the starting solution. The progress of the oxidation was monitored by optical spectroscopy. Transient polyselenides appeared immediately after the electron pulse and rapidly proceeded to form adducts with HSe{sup {minus}}, i.e., HSe{sub 2}{sup 2{minus}} and H{sub 2}Se{sub 2}{sup {minus}}, and a fairly long-lived intermediate that was identified as the diselenide radical anion Se{sub 2}{sup {minus}}. These radicals recombine to give eventually the tetraselenide dianion, Se{sub 4}{sup 2{minus}}.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Univ. of Stuttgart (DE)
Sponsoring Org.:
USDOE
OSTI Identifier:
20034421
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Journal Article
Journal Name:
Journal of Physical Chemistry A: Molecules, Spectroscopy, Kinetics, Environment, amp General Theory
Additional Journal Information:
Journal Volume: 104; Journal Issue: 17; Other Information: PBD: 4 May 2000; Journal ID: ISSN 1089-5639
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; SELENIDES; PHOTOELECTROCHEMICAL CELLS; OXIDATION; HYDROXYL RADICALS; PULSED IRRADIATION; REACTION INTERMEDIATES; RADIOLYSIS; ELECTRONS

Citation Formats

Goldbach, A., Saboungi, M.L., Johnson, J.A., Cook, A.R., and Meisel, D. Oxidation of aqueous polyselenide solutions. A mechanistic pulse radiolysis study. United States: N. p., 2000. Web. doi:10.1021/jp994361g.
Goldbach, A., Saboungi, M.L., Johnson, J.A., Cook, A.R., & Meisel, D. Oxidation of aqueous polyselenide solutions. A mechanistic pulse radiolysis study. United States. doi:10.1021/jp994361g.
Goldbach, A., Saboungi, M.L., Johnson, J.A., Cook, A.R., and Meisel, D. Thu . "Oxidation of aqueous polyselenide solutions. A mechanistic pulse radiolysis study". United States. doi:10.1021/jp994361g.
@article{osti_20034421,
title = {Oxidation of aqueous polyselenide solutions. A mechanistic pulse radiolysis study},
author = {Goldbach, A. and Saboungi, M.L. and Johnson, J.A. and Cook, A.R. and Meisel, D.},
abstractNote = {The oxidation of aqueous polyselenide solutions was studied by pulse radiolysis in the presence of N{sub 2}O at pH 12.3; the hydroxyl radical OH was the predominant oxidant, while hydrogen selenide anions HSe{sup {minus}} and triselenide dianions Se{sub 3}{sup 2{minus}} were the major selenide species in the starting solution. The progress of the oxidation was monitored by optical spectroscopy. Transient polyselenides appeared immediately after the electron pulse and rapidly proceeded to form adducts with HSe{sup {minus}}, i.e., HSe{sub 2}{sup 2{minus}} and H{sub 2}Se{sub 2}{sup {minus}}, and a fairly long-lived intermediate that was identified as the diselenide radical anion Se{sub 2}{sup {minus}}. These radicals recombine to give eventually the tetraselenide dianion, Se{sub 4}{sup 2{minus}}.},
doi = {10.1021/jp994361g},
journal = {Journal of Physical Chemistry A: Molecules, Spectroscopy, Kinetics, Environment, amp General Theory},
issn = {1089-5639},
number = 17,
volume = 104,
place = {United States},
year = {2000},
month = {5}
}