MPG

The MPI-Mainz UV/VIS Spectral Atlas

of Gaseous Molecules of Atmospheric Interest

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

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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 / Freons-CFC(C,F,Cl) / (Z)-1,2-c-C4F6Cl2 / Papadimitriou(2013)_296K_190-220nm(calc)

DATAFILE: (Z)-1,2-c-C4F6Cl2_Papadimitriou(2013)_296K_190-220nm(calc).txt
NAME: (Z)-1,2-dichlorohexafluorocyclobutane
FORMULA: (Z)-1,2-c-C4F6Cl2
AUTHOR(YEAR): Papadimitriou(2013)
T: 296K
λ: 190-220nm(calc)
BIBLIOGRAPHY: V.C. Papadimitriou, M.R. McGillen, S.S. Smith, A.M. Jubb, R.W. Portmann, B.D. Hall, E.L. Fleming, C.H. Jackman, and J.B. Burkholder, "1,2-Dichlorohexafluoro-cyclobutane (1,2-c-C4F6Cl2, R-316c) a potent ozone depleting substance and greenhouse gas: Atmospheric loss processes, lifetimes, and ozone depletion and global warming potentials for the (E) and (Z) stereoisomers", J. Phys. Chem. A 117, 11049-11065 (2013); DOI: 10.1021/jp407823k
COMMENTS: The UV absorption spectra of the individual (E) and (Z) isomers were not measured directly but determined from a linear regression analysis of the measured spectra of the isomerically mixed samples and their mixing ratios

Parameterization of the temperature dependence valid over the 190−225 nm wavelength range and 210−296 K temperature range:

log10 (σ(λ,T)) = ∑i Ai (λ - 200)i + (296 – T) ∑i Bi (λ - 200)i

with the following parameters Ai and Bi:

------------------------------------------------
i    Ai       Bi
------------------------------------------------

0  -19.24      0.00155
1  -0.1037     -0.000761
2  0.00203      -1.22×10-5
3     4.9656×10-6    5.52×10-6
4  -1.65×10-5       -2.365×10-7
5     5.03×10-7     2.33×10-9

The absorption cross sections as plotted in Fig. 3 have been calculated using this parameterization

The parameterization has been recommended by

J. B. Burkholder, S. P. Sander, J. Abbatt, J. R. Barker, R. E. Huie, C. E. Kolb, M. J. Kurylo, V. L. Orkin, D. M. Wilmouth, and P. H. Wine "Chemical Kinetics and Photochemical Data for Use in Atmospheric Studies, Evaluation No. 18," JPL Publication 15-10, Jet Propulsion Laboratory, Pasadena, 2015 http://jpldataeval.jpl.nasa.gov

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