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) / C2H5I / JPL-2010(2011)_298K_205-355nm(rec)

DATAFILE: C2H5I_JPL-2010(2011)_298K_205-355nm(rec).txt
NAME: iodoethane, ethyl iodide
FORMULA: C2H5I
AUTHOR(YEAR): JPL-2010(2011)
T: 298K
λ: 205-355nm(rec)
BIBLIOGRAPHY: S.P. Sander, J. Abbatt, J. R. Barker, J. B. Burkholder, R. R. Friedl, D. M. Golden, R. E. Huie, C. E. Kolb, M. J. Kurylo, G. K. Moortgat, V. L. Orkin and P. H. Wine, "Chemical Kinetics and Photochemical Data for Use in Atmospheric Studies, Evaluation Number 17", JPL Publication 10-6, Jet Propulsion Laboratory, Pasadena, 2011; http://jpldataeval.jpl.nasa.gov/
COMMENTS: JPL-2010 recommendation, adopting the earlier recommendations of

S.P. Sander, R.R. Friedl, D.M. Golden, M.J. Kurylo, R.E. Huie, V.L. Orkin, G.K. Moortgat, A.R. Ravishankara, C.E. Kolb, M.J. Molina, and B.J. Finlayson-Pitts, “Chemical Kinetics and Photochemical Data for Use in Atmospheric Studies. Evaluation Number 14“, JPL Publication 02-25, Jet Propulsion Laboratory, Pasadena, 2002; http://jpldataeval.jpl.nasa.gov/, and

S.P. Sander, R.R. Friedl, D.M. Golden, M.J. Kurylo, G.K. Moortgat, H. Keller-Rudek, P.H. Wine, A.R. Ravishankara, C.E. Kolb, M.J. Molina, B.J. Finlayson-Pitts, R.E. Huie, V.L. Orkin, “Chemical Kinetics and Photochemical Data for Use in Atmospheric Studies. Evaluation Number 15“, JPL Publication 06-2, Jet Propulsion Laboratory, Pasadena, 2006; http://jpldataeval.jpl.nasa.gov/:

Absorption cross sections σ:

205-230 nm, 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,

235-355 nm, 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

O.V. Rattigan, D.E. Shallcross, and R.A. Cox, "UV absorption cross-sections and atmospheric photolysis rates of CF3I, CH3I, C2H5I and CH2ICl," J. Chem. Soc. Faraday Trans. 93, 2839-2846 (1997); DOI: 10.1039/A701529A.

Temperature coefficients a1 and a2:

223-298 K,
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,

σ(λ, T) = σ(298 K) [1 + a1(T - 298) + a2(T - 298)2] with

--------------------------------
λ   103 a1 105 a2
(nm) (K-1)   (K-2)
--------------------------------
205  6.38  3.15
210  4.07  6.28
215  4.93  6.75
220  4.06  5.70
225  2.81  3.81
230  2.62  3.83
235  1.28  2.17
240  0.876   1.96
245  0.233   1.62
250 -0.111  1.58
255 -1.03    0.606
260 -1.48   -0.0332
265 -1.09  1.2e-6
270 -0.54   -0.257
275  0.770  0.0299
280  2.01  0.110
285  3.85  0.926
290  5.47  1.65
295  7.00  2.52
300  8.56  4.11
305  9.31  4.89
310 10.56   6.87
315 10.83   6.81
320 11.98   9.76
325 12.98  11.30
330 14.56  17.50
335 18.81  24.60
340 13.90  9.08
345 18.86  22.1
350 20.19  20.1
355 -7.04  -40.5

Temperature coefficients B:

243-333 K,
O.V. Rattigan, D.E. Shallcross, and R.A. Cox, "UV absorption cross-sections and atmospheric photolysis rates of CF3I, CH3I, C2H5I and CH2ICl," J. Chem. Soc. Faraday Trans. 93, 2839-2846 (1997); DOI: 10.1039/A701529A.

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

---------------------
λ    103 B
(nm) (K-1)
----------------------
235 -0.27
240 -0.40
245 -0.62
250 -0.79
255 -0.82
260 -0.75
265 -0.44
270  0.36
275  1.23
280  2.36
285  3.61
290  4.83
295  6.33
300  7.48
305  8.08
310  7.55
315  7.92
320  8.27
325  8.81
330  9.30
335 10.20
340 11.16
345 12.41
350 11.28
355 12.20

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