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 for this work

21 Citations (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.

Original language	English
Journal	Journal of Physical Chemistry
Volume	100
Issue number	16
Pages (from-to)	6572-6579
Number of pages	8
ISSN	0022-3654
Publication status	Published - 18 Apr 1996

Cite this

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.

In: Journal of Physical Chemistry, Vol. 100, No. 16, 18.04.1996, p. 6572-6579.

Research output: Contribution to journal › Journal article › Research › peer-review

@article{541f0d2a678c4bdaaf3fc5c7dd26379d,

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.}",

year = "1996",

month = apr,

day = "18",

language = "English",

volume = "100",

pages = "6572--6579",

journal = "Journal of Physical Chemistry",

issn = "0022-3654",

publisher = "American Chemical Society",

number = "16",

}

TY - JOUR

T1 - Atmospheric chemistry of HFC-227ca

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.

PY - 1996/4/18

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.

UR - http://www.scopus.com/inward/record.url?scp=0000128415&partnerID=8YFLogxK

M3 - Journal article

AN - SCOPUS:0000128415

SN - 0022-3654

VL - 100

SP - 6572

EP - 6579

JO - Journal of Physical Chemistry

JF - Journal of Physical Chemistry

IS - 16

ER -

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

Other files and links

Fingerprint

Cite this