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 / Mossinger(1998)_273K_215-375nm(calc)

DATAFILE: CH2I2_Mossinger(1998)_273K_215-375nm(calc).txt
NAME: diiodomethane
FORMULA: CH2I2
AUTHOR(YEAR): Mossinger(1998)
T: 273K
λ: 215-375nm(calc)
BIBLIOGRAPHY: 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
COMMENTS: Absorption measurements at 278 to 348 K using a dual-beam diode array spectrometer (spectral resolution ∼0.6 nm)

Calculated absorption cross sections using the values measured at 298 K, the equation

ln σ(λ, T) = ln σ(λ, 298 K) + B × (T - 298),

and the temperature coefficients B:
-------------------
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

*) B(305 nm) erroneously +0.89 in Table 1; corrected to -0.16, after personal communication with Juliane C. Mössinger (March 2001)

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