The MPI-Mainz UV/VIS Spectral Atlas

of Gaseous Molecules of Atmospheric Interest

www.uv-vis-spectral-atlas-mainz.org

Hannelore Keller-Rudek1, Geert K. Moortgat2, Rolf Sander2, Rüdiger Sörensen1

1Satellite Group

2Atmospheric Chemistry Division

Max-Planck Institute for Chemistry
Mainz, Germany

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When referring to the Spectral Atlas, please cite our publication:

Keller-Rudek, H., Moortgat, G. K., Sander, R., and Sörensen, R.: The MPI-Mainz UV/VIS spectral atlas of gaseous molecules of atmospheric interest, Earth Syst. Sci. Data, 5, 365–373, (2013), DOI: 10.5194/essd-5-365-2013

Cross Sections / Halogeno-alkanes+radicals / Halons(C,H,F,Cl,Br) / CF2Br / Vatsa(1993)_298K_262nm(max)

DATAFILE: CF2Br_Vatsa(1993)_298K_262nm(max).txt
NAME: bromodifluoromethyl radical
FORMULA: CF2Br
AUTHOR(YEAR): Vatsa(1993)
T: 298K
λ: 262nm(max)
BIBLIOGRAPHY: R.K. Vatsa, A. Kumar, P.D. Naik, K.V.S. Rama Rao, and J.P. Mittal, "UV absorption spectrum and decay kinetics of CF2Br in CO2 laser-induced photodissociation of CF2Br2", Chem. Phys. Lett. 207, 75-80 (1993); DOI: 10.1016/0009-2614(93)85014-F
COMMENTS: The UV absorption spectrum of the CF2Br transient, formed in the photodissociation of CF2Br2 using a pulsed CO2 laser, shows a broad band in the region of 220-320 nm with a maximum around 260 nm (see Fig. 3)

The absorption cross section at 262 nm has been estimated

The authors note that the CF2 absorption cross section at 262 nm is reported to be 1.37×10-18 cm2 molecule-1,

S. Sharpe, B. Hartnett, H.S. Sethi, and D.S. Sethi, "Absorption cross-sections of CF2 in the A 1B1 - X 1A1 transition at 0.5 nm intervals and absolute rate constant for 2CF2 → C2F4 at 298 ± 3 K," J. Photochem. 38, 1-13 (1987),

and hence a small contribution from CF2 can be expected

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