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 / Iodoalkanes(C,H,F,Cl,Br,I) / CH2I2 / IUPAC(2008)_298K_205-355nm(rec)

DATAFILE: CH2I2_IUPAC(2008)_298K_205-355nm(rec).txt
NAME: diiodomethane
FORMULA: CH2I2
AUTHOR(YEAR): IUPAC(2008)
T: 298K
λ: 205-355nm(rec)
BIBLIOGRAPHY: R. Atkinson, D.L. Baulch, R.A. Cox, J.N. Crowley, R.F. Hampson, R.G. Hynes, M.E. Jenkin, M.J. Rossi, J. Troe, and T.J. Wallington, "Evaluated kinetic and photochemical data for atmospheric chemistry: Volume IV - gas phase reactions of organic halogen species", Atmos. Chem. Phys. 8, 4141-4496 (2008); DOI: 10.5194/acp-8-4141-2008
COMMENTS: IUPAC(2008) recommendation:

Mean of the data of

C.M. Roehl, J.B. Burkholder, G.K. Moortgat, A.R. Ravishankara, and P.J. Crutzen, "Temperature dependence of UV absorption cross sections and atmospheric implications of several alkyl iodides," J. Geophys. Res. 102(D11), 12819-12829 (1997); DOI: 10.1029/97JD00530, and

J.C. Mössinger, D.E. Shallcross, and R.A. Cox, "UV-VIS absorption cross-sections and atmospheric lifetimes of CH2Br2, CH2I2, and CH2BrI," J. Chem. Soc. Faraday Trans. 94, 1391-1396 (1998); DOI: 10.1039/A709160E

The temperature dependence ln σ(T) = ln σ(298K) + B × (T - 298) and the temperature coefficients B (273-348 K):

-------------------
λ   103 B
(nm)   (K-1)
-------------------
215  0.15
220  0.14
225  0.19
230  0.51
235  0.56
240  0.15
245  0.18
250  0.67
255  1.58
260  2.04
265  1.30
270  0.00
275 -0.71
280 -1.24
285 -1.21
290 -0.94
295 -0.58
300 -0.37
305 -0.16
310  0.07
315  0.15
320  0.27
325  0.27
330  0.51
335  0.55
340  1.36
345  1.99
350  3.19
355  4.09
360  5.39
365  6.77
370  8.25
375 11.30

are adopted from the work of Mössinger et al. (1998)

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