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
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| DATAFILE: | CH3C(O)C2H5_IUPAC(2021)_296K_200-355nm(rec).txt |
| NAME: | methyl ethyl ketone, MEK, 2-butanone |
| FORMULA: | CH3C(O)C2H5 |
| AUTHOR(YEAR): | IUPAC(2021) |
| T: | 296K |
| λ: | 200-355nm(rec) |
| BIBLIOGRAPHY: |
A. Mellouki, M. Ammann, R. A. Cox, J. N. Crowley, H. Herrmann, M. E. Jenkin, F. McNeill, J. Troe, and T. J. Wallington, "Evaluated kinetic and photochemical data for atmospheric chemistry: volume VIII – gas-phase reactions of organic species with four, or more, carbon atoms ( ≥ C4)",
Atmos. Chem. Phys. 21, 4797–4808 (2021);
DOI: 10.5194/acp-21-4797-2021
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| COMMENTS: | IUPAC(2021) recommendation:
The preferred absorption cross-sections at 296 K are taken from the most recent data (200-335 nm) of
J.F. Brewer, J D. K. Papanastasiou, J. B. Burkholder, E. V. Fischer, Y. Ren, A. Mellouki, and A. R. Ravishankara, Atmospheric photolysis of methyl ethyl, diethyl, and propyl ethyl ketones: Temperature‐dependent UV absorption cross sections, J. Geophys. Res. Atmospheres 124, 5906-5918 (2019); DOI: 5910.1029/2019JD030391,
extended to 355 nm by the measurements of
R.D. Martinez, A. A. Buitrago, N. W. Howell, C. H. Hearn, and J. A. Joens,The near UV absorption spectra of several aliphatic aldehydes and ketones, Atmos. Environ. 26A, 785-792 (1992); DOI: 10.1016/0960-1686(92)90238-G
Brewer et al. provide an expression to calculate cross-sections (230-335 nm) at different temperatures, σ(λ,T), using a two-state model with the following expression, which was
validated with their experimental data:
σ(λ,T) = X0σ0 + X1σ1,
where X0 = (1+exp (-2474.696/T))-1, X1 = 1- X0 and T is the temperature in Kelvin
Wavelength dependent values of σ0 and σ1 are listed in the table along with the room temperature cross-sections |
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