On the reactions of CO. 3 -radicals with NO(x) radicals

Z. B. Alfassi, Dhanasekaran Thirunavukkarasu, R. E. Huie, P. Neta

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Abstract

The reactions of CO. 3 - radicals with NO(x) radicals were studied by pulse radiolysis of deoxygenated aqueous solutions containing carbonate and nitrate ions. The .OH radicals react with carbonate to yield CO. 3 - and the e(aq)- reacts with nitrate to yield NO. 3 2-, which then converts into NO. 2. This conversion has a rate constant of 4.6x104 s-1 in alkaline solutions but is catalyzed by HCO3 - (k=2.8x107 L mol-1 s-1). The CO. 3 - radicals react rapidly with both NO. 3 2- (k=1.0x109 L mol-1 s-1) and NO2 . (k=4.6x108 L mol-1 s-1). The expected combination product was short lived and was not observed on the microsecond time scale and the possible peroxynitrite product was not detected following γ-radiolysis. A similar study with solutions containing carbonate and nitrite shows that NO. 2 2- reacts with CO. 3 - faster than NO. 3 2- and NO reacts with CO. 3 - faster than NO. 2. Copyright (C) 1999.

Original languageEnglish
Pages (from-to)475-482
Number of pages8
JournalRadiation Physics and Chemistry
Volume56
Issue number4
DOIs
Publication statusPublished - Oct 1999
Externally publishedYes

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carbonates
radiolysis
nitrates
nitrites
products
aqueous solutions
pulses
ions

ASJC Scopus subject areas

  • Radiation

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On the reactions of CO. 3 -radicals with NO(x) radicals. / Alfassi, Z. B.; Thirunavukkarasu, Dhanasekaran; Huie, R. E.; Neta, P.

In: Radiation Physics and Chemistry, Vol. 56, No. 4, 10.1999, p. 475-482.

Research output: Contribution to journalArticle

Alfassi, Z. B. ; Thirunavukkarasu, Dhanasekaran ; Huie, R. E. ; Neta, P. / On the reactions of CO. 3 -radicals with NO(x) radicals. In: Radiation Physics and Chemistry. 1999 ; Vol. 56, No. 4. pp. 475-482.
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