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

Z. B. Alfassi; T. Dhanasekaran; R. E. Huie; P. Neta

doi:10.1016/S0969-806X(99)00331-X

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

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

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

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 language	English
Pages (from-to)	475-482
Number of pages	8
Journal	Radiation Physics and Chemistry
Volume	56
Issue number	4
DOIs	https://doi.org/10.1016/S0969-806X(99)00331-X
State	Published - 1 Oct 1999
Externally published	Yes

ASJC Scopus subject areas

Radiation

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title = "On the reactions of CO.3-radicals with NO(x) radicals",

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.32-, 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.32- (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.22- reacts with CO.3- faster than NO.32- and NO reacts with CO.3- faster than NO.2. Copyright (C) 1999.",

author = "Alfassi, {Z. B.} and T. Dhanasekaran and Huie, {R. E.} and P. Neta",

year = "1999",

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T1 - On the reactions of CO.3-radicals with NO(x) radicals

AU - Alfassi, Z. B.

AU - Dhanasekaran, T.

AU - Huie, R. E.

AU - Neta, P.

PY - 1999/10/1

Y1 - 1999/10/1

N2 - 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.32-, 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.32- (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.22- reacts with CO.3- faster than NO.32- and NO reacts with CO.3- faster than NO.2. Copyright (C) 1999.

AB - 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.32-, 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.32- (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.22- reacts with CO.3- faster than NO.32- and NO reacts with CO.3- faster than NO.2. Copyright (C) 1999.

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SN - 0969-806X

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EP - 482

JO - Radiation Physics and Chemistry

JF - Radiation Physics and Chemistry

IS - 4

ER -

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

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