Atmospheric chemistry of HFC-227ca: Spectrokinetic investigation of the CF3CF2CF2O2 radical, its reactions with NO and NO2, and the atmospheric fate of the CF3CF2CF2O radical

Anders M.B. Giessing; Anders Feilberg; Trine E. Møgelberg; Jens Sehested; Merete Bilde; Timothy J. Wallington; Ole J. Nielsen

Atmospheric chemistry of HFC-227ca: Spectrokinetic investigation of the CF₃CF₂CF₂O₂ radical, its reactions with NO and NO₂, and the atmospheric fate of the CF₃CF₂CF₂O radical

Anders M.B. Giessing, Anders Feilberg, Trine E. Møgelberg, Jens Sehested^*, Merete Bilde, Timothy J. Wallington, Ole J. Nielsen

^*Corresponding author af dette arbejde

21 Citationer (Scopus)

Abstract

A pulse radiolysis technique was used to study the UV absorption spectrum of CF₃CF₂CF₂O₂ radicals, at 230 nm σ = (3.2 ± 0.4) × 10^-18 cm² molecule^-1. Rate constants for reactions of CF₃CF₂CF₂O₂ radicals with NO and NO₂ were k₃ > 7 × 10^-12 cm³ molecule^-1 s^-1 and k₄ = (7.6 ± 2.4) × 10^-12 cm³ molecule^-1 s^-1, respectively. The rate constant for reaction of F atoms with CF₃CF₂CF₂H was determined by using an absolute rate technique to be (3.6 ± 1.3) × 10^-13 cm³ molecule^-1 s^-1. The atmospheric fate of CF₃CF₂CF₂O radicals is decomposition via C-C bond scission to give CF₃CF₂ radicals and CF₂O. In one bar of SF₆ at 296 K, CF₃CF₂CF₂O radicals decompose with a rate > 1.5 × 10⁵ s^-1. In their turn CF₃CF₂ radicals are converted into CF₃CF₂O radicals which also decompose via C-C bond scission. As part of this work a relative rate method was used to measure k(Cl + CF₃CF₂CF₂H) = (3.4 ± 0.7) × 10^-16 and k(F + CF₃CF₂CF₂H) = (3.2 ± 0.8) × 10^-13 cm³ molecule^-1 s^-1. The results are discussed with respect to the atmospheric chemistry of HFC-227ca.

Originalsprog	Engelsk
Tidsskrift	Journal of Physical Chemistry
Vol/bind	100
Udgave nummer	16
Sider (fra-til)	6572-6579
Antal sider	8
ISSN	0022-3654
Status	Udgivet - 18 apr. 1996

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Citationsformater

Atmospheric chemistry of HFC-227ca : Spectrokinetic investigation of the CF₃CF₂CF₂O₂ radical, its reactions with NO and NO₂, and the atmospheric fate of the CF₃CF₂CF₂O radical. / Giessing, Anders M.B.; Feilberg, Anders; Møgelberg, Trine E. et al.

I: Journal of Physical Chemistry, Bind 100, Nr. 16, 18.04.1996, s. 6572-6579.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

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title = "Atmospheric chemistry of HFC-227ca: Spectrokinetic investigation of the CF3CF2CF2O2 radical, its reactions with NO and NO2, and the atmospheric fate of the CF3CF2CF2O radical",

abstract = "A pulse radiolysis technique was used to study the UV absorption spectrum of CF3CF2CF2O2 radicals, at 230 nm σ = (3.2 ± 0.4) × 10-18 cm2 molecule-1. Rate constants for reactions of CF3CF2CF2O2 radicals with NO and NO2 were k3 > 7 × 10-12 cm3 molecule-1 s-1 and k4 = (7.6 ± 2.4) × 10-12 cm3 molecule-1 s-1, respectively. The rate constant for reaction of F atoms with CF3CF2CF2H was determined by using an absolute rate technique to be (3.6 ± 1.3) × 10-13 cm3 molecule-1 s-1. The atmospheric fate of CF3CF2CF2O radicals is decomposition via C-C bond scission to give CF3CF2 radicals and CF2O. In one bar of SF6 at 296 K, CF3CF2CF2O radicals decompose with a rate > 1.5 × 105 s-1. In their turn CF3CF2 radicals are converted into CF3CF2O radicals which also decompose via C-C bond scission. As part of this work a relative rate method was used to measure k(Cl + CF3CF2CF2H) = (3.4 ± 0.7) × 10-16 and k(F + CF3CF2CF2H) = (3.2 ± 0.8) × 10-13 cm3 molecule-1 s-1. The results are discussed with respect to the atmospheric chemistry of HFC-227ca.",

author = "Giessing, {Anders M.B.} and Anders Feilberg and M{\o}gelberg, {Trine E.} and Jens Sehested and Merete Bilde and Wallington, {Timothy J.} and Nielsen, {Ole J.}",

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T2 - Spectrokinetic investigation of the CF3CF2CF2O2 radical, its reactions with NO and NO2, and the atmospheric fate of the CF3CF2CF2O radical

AU - Giessing, Anders M.B.

AU - Feilberg, Anders

AU - Møgelberg, Trine E.

AU - Sehested, Jens

AU - Bilde, Merete

AU - Wallington, Timothy J.

AU - Nielsen, Ole J.

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Y1 - 1996/4/18

N2 - A pulse radiolysis technique was used to study the UV absorption spectrum of CF3CF2CF2O2 radicals, at 230 nm σ = (3.2 ± 0.4) × 10-18 cm2 molecule-1. Rate constants for reactions of CF3CF2CF2O2 radicals with NO and NO2 were k3 > 7 × 10-12 cm3 molecule-1 s-1 and k4 = (7.6 ± 2.4) × 10-12 cm3 molecule-1 s-1, respectively. The rate constant for reaction of F atoms with CF3CF2CF2H was determined by using an absolute rate technique to be (3.6 ± 1.3) × 10-13 cm3 molecule-1 s-1. The atmospheric fate of CF3CF2CF2O radicals is decomposition via C-C bond scission to give CF3CF2 radicals and CF2O. In one bar of SF6 at 296 K, CF3CF2CF2O radicals decompose with a rate > 1.5 × 105 s-1. In their turn CF3CF2 radicals are converted into CF3CF2O radicals which also decompose via C-C bond scission. As part of this work a relative rate method was used to measure k(Cl + CF3CF2CF2H) = (3.4 ± 0.7) × 10-16 and k(F + CF3CF2CF2H) = (3.2 ± 0.8) × 10-13 cm3 molecule-1 s-1. The results are discussed with respect to the atmospheric chemistry of HFC-227ca.

AB - A pulse radiolysis technique was used to study the UV absorption spectrum of CF3CF2CF2O2 radicals, at 230 nm σ = (3.2 ± 0.4) × 10-18 cm2 molecule-1. Rate constants for reactions of CF3CF2CF2O2 radicals with NO and NO2 were k3 > 7 × 10-12 cm3 molecule-1 s-1 and k4 = (7.6 ± 2.4) × 10-12 cm3 molecule-1 s-1, respectively. The rate constant for reaction of F atoms with CF3CF2CF2H was determined by using an absolute rate technique to be (3.6 ± 1.3) × 10-13 cm3 molecule-1 s-1. The atmospheric fate of CF3CF2CF2O radicals is decomposition via C-C bond scission to give CF3CF2 radicals and CF2O. In one bar of SF6 at 296 K, CF3CF2CF2O radicals decompose with a rate > 1.5 × 105 s-1. In their turn CF3CF2 radicals are converted into CF3CF2O radicals which also decompose via C-C bond scission. As part of this work a relative rate method was used to measure k(Cl + CF3CF2CF2H) = (3.4 ± 0.7) × 10-16 and k(F + CF3CF2CF2H) = (3.2 ± 0.8) × 10-13 cm3 molecule-1 s-1. The results are discussed with respect to the atmospheric chemistry of HFC-227ca.

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Atmospheric chemistry of HFC-227ca: Spectrokinetic investigation of the CF3CF2CF2O2 radical, its reactions with NO and NO2, and the atmospheric fate of the CF3CF2CF2O radical

Abstract

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Citationsformater

Atmospheric chemistry of HFC-227ca: Spectrokinetic investigation of the CF₃CF₂CF₂O₂ radical, its reactions with NO and NO₂, and the atmospheric fate of the CF₃CF₂CF₂O radical