Atmospheric chemistry of FCOx radicals: UV spectra and self-reaction kinetics of FCO and FC(O)O2 and kinetics of some reactions of FCOx with O2, O3, and NO at 296 K

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Atmospheric chemistry of FCOx radicals : UV spectra and self-reaction kinetics of FCO and FC(O)O2 and kinetics of some reactions of FCOx with O2, O3, and NO at 296 K. / Wallington, Timothy J.; Ellermann, Thomas; Nielsen, Ole J.; Sehested, Jens.

In: Journal of Physical Chemistry, Vol. 98, No. 9, 01.01.1994, p. 2346-2356.

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

Harvard

Wallington, TJ, Ellermann, T, Nielsen, OJ & Sehested, J 1994, 'Atmospheric chemistry of FCOx radicals: UV spectra and self-reaction kinetics of FCO and FC(O)O2 and kinetics of some reactions of FCOx with O2, O3, and NO at 296 K', Journal of Physical Chemistry, vol. 98, no. 9, pp. 2346-2356. https://doi.org/10.1021/j100060a024

APA

Wallington, T. J., Ellermann, T., Nielsen, O. J., & Sehested, J. (1994). Atmospheric chemistry of FCOx radicals: UV spectra and self-reaction kinetics of FCO and FC(O)O2 and kinetics of some reactions of FCOx with O2, O3, and NO at 296 K. Journal of Physical Chemistry, 98(9), 2346-2356. https://doi.org/10.1021/j100060a024

Vancouver

Wallington TJ, Ellermann T, Nielsen OJ, Sehested J. Atmospheric chemistry of FCOx radicals: UV spectra and self-reaction kinetics of FCO and FC(O)O2 and kinetics of some reactions of FCOx with O2, O3, and NO at 296 K. Journal of Physical Chemistry. 1994 Jan 1;98(9):2346-2356. https://doi.org/10.1021/j100060a024

Author

Wallington, Timothy J. ; Ellermann, Thomas ; Nielsen, Ole J. ; Sehested, Jens. / Atmospheric chemistry of FCOx radicals : UV spectra and self-reaction kinetics of FCO and FC(O)O2 and kinetics of some reactions of FCOx with O2, O3, and NO at 296 K. In: Journal of Physical Chemistry. 1994 ; Vol. 98, No. 9. pp. 2346-2356.

Bibtex

@article{5e4d26e89b0b44bb853912452ad8927a,
title = "Atmospheric chemistry of FCOx radicals: UV spectra and self-reaction kinetics of FCO and FC(O)O2 and kinetics of some reactions of FCOx with O2, O3, and NO at 296 K",
abstract = "A pulse radiolysis technique has been used to measure the UV spectra of FCO and FC(O)O2 radicals over the ranges 265-275 and 220-290 nm, respectively. At 269.6 nm, σFCO = (1.7 ± 0.2) × 10-18 cm2 molecule-1; at 250 nm, σFC(O)O2 = (2.1 ± 0.2) × 10-18 cm2 molecule-1. The decay of UV absorption was used to study the kinetics of the self-reactions of FCO and FC(O)O2 radicals at 296 ± 2 K. Observed self-reaction rate constants, defined as -d[FCO]/dt = 2k7[FCO]2 and -d[FC(O)O2]/dt = 2k8obs[FC(O)O2]2, were k7 = (1.6 ± 0.2) × 10-11 and k8obs = (6.0 ± 0.7) × 10-12 cm3 molecule-1 s-1. A rate constant, k1 = (1.2 ± 0.2) × 10-12 cm3 molecule-1 s-1, was derived for the addition reaction FCO + O2 → FC(O)O2 in 1000 mbar of SF6 diluent. Rate constants for the reactions of FCO, FC(O)O, and FC(O)O2 radicals with NO were determined to be (1.0 ± 0.2) × 10-12, (1.3 ± 0.7) × 10-10, and (2.5 ± 0.8) × 10-11, cm3 molecule-1 s-1, respectively. An upper limit of k3 < 6 × 10-14 cm3 molecule-1 s-1 was measured for the reaction of FC(O)O radicals with O3. Finally, a rate constant of (5.5 ± 0.7) × 10-12 cm3 molecule-1 s-1 was measured for the association reaction of F atoms to NO in 1000 mbar of SF6 diluent. All experiments were performed at 296 ± 2 K. Results are discussed with respect to the atmospheric chemistry of hydrofluorocarbons.",
author = "Wallington, {Timothy J.} and Thomas Ellermann and Nielsen, {Ole J.} and Jens Sehested",
year = "1994",
month = jan,
day = "1",
doi = "10.1021/j100060a024",
language = "English",
volume = "98",
pages = "2346--2356",
journal = "Journal of Physical Chemistry",
issn = "0022-3654",
publisher = "American Chemical Society",
number = "9",

}

RIS

TY - JOUR

T1 - Atmospheric chemistry of FCOx radicals

T2 - UV spectra and self-reaction kinetics of FCO and FC(O)O2 and kinetics of some reactions of FCOx with O2, O3, and NO at 296 K

AU - Wallington, Timothy J.

AU - Ellermann, Thomas

AU - Nielsen, Ole J.

AU - Sehested, Jens

PY - 1994/1/1

Y1 - 1994/1/1

N2 - A pulse radiolysis technique has been used to measure the UV spectra of FCO and FC(O)O2 radicals over the ranges 265-275 and 220-290 nm, respectively. At 269.6 nm, σFCO = (1.7 ± 0.2) × 10-18 cm2 molecule-1; at 250 nm, σFC(O)O2 = (2.1 ± 0.2) × 10-18 cm2 molecule-1. The decay of UV absorption was used to study the kinetics of the self-reactions of FCO and FC(O)O2 radicals at 296 ± 2 K. Observed self-reaction rate constants, defined as -d[FCO]/dt = 2k7[FCO]2 and -d[FC(O)O2]/dt = 2k8obs[FC(O)O2]2, were k7 = (1.6 ± 0.2) × 10-11 and k8obs = (6.0 ± 0.7) × 10-12 cm3 molecule-1 s-1. A rate constant, k1 = (1.2 ± 0.2) × 10-12 cm3 molecule-1 s-1, was derived for the addition reaction FCO + O2 → FC(O)O2 in 1000 mbar of SF6 diluent. Rate constants for the reactions of FCO, FC(O)O, and FC(O)O2 radicals with NO were determined to be (1.0 ± 0.2) × 10-12, (1.3 ± 0.7) × 10-10, and (2.5 ± 0.8) × 10-11, cm3 molecule-1 s-1, respectively. An upper limit of k3 < 6 × 10-14 cm3 molecule-1 s-1 was measured for the reaction of FC(O)O radicals with O3. Finally, a rate constant of (5.5 ± 0.7) × 10-12 cm3 molecule-1 s-1 was measured for the association reaction of F atoms to NO in 1000 mbar of SF6 diluent. All experiments were performed at 296 ± 2 K. Results are discussed with respect to the atmospheric chemistry of hydrofluorocarbons.

AB - A pulse radiolysis technique has been used to measure the UV spectra of FCO and FC(O)O2 radicals over the ranges 265-275 and 220-290 nm, respectively. At 269.6 nm, σFCO = (1.7 ± 0.2) × 10-18 cm2 molecule-1; at 250 nm, σFC(O)O2 = (2.1 ± 0.2) × 10-18 cm2 molecule-1. The decay of UV absorption was used to study the kinetics of the self-reactions of FCO and FC(O)O2 radicals at 296 ± 2 K. Observed self-reaction rate constants, defined as -d[FCO]/dt = 2k7[FCO]2 and -d[FC(O)O2]/dt = 2k8obs[FC(O)O2]2, were k7 = (1.6 ± 0.2) × 10-11 and k8obs = (6.0 ± 0.7) × 10-12 cm3 molecule-1 s-1. A rate constant, k1 = (1.2 ± 0.2) × 10-12 cm3 molecule-1 s-1, was derived for the addition reaction FCO + O2 → FC(O)O2 in 1000 mbar of SF6 diluent. Rate constants for the reactions of FCO, FC(O)O, and FC(O)O2 radicals with NO were determined to be (1.0 ± 0.2) × 10-12, (1.3 ± 0.7) × 10-10, and (2.5 ± 0.8) × 10-11, cm3 molecule-1 s-1, respectively. An upper limit of k3 < 6 × 10-14 cm3 molecule-1 s-1 was measured for the reaction of FC(O)O radicals with O3. Finally, a rate constant of (5.5 ± 0.7) × 10-12 cm3 molecule-1 s-1 was measured for the association reaction of F atoms to NO in 1000 mbar of SF6 diluent. All experiments were performed at 296 ± 2 K. Results are discussed with respect to the atmospheric chemistry of hydrofluorocarbons.

UR - http://www.scopus.com/inward/record.url?scp=0342764773&partnerID=8YFLogxK

U2 - 10.1021/j100060a024

DO - 10.1021/j100060a024

M3 - Journal article

AN - SCOPUS:0342764773

VL - 98

SP - 2346

EP - 2356

JO - Journal of Physical Chemistry

JF - Journal of Physical Chemistry

SN - 0022-3654

IS - 9

ER -

ID: 228192915