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: 210-230 nm, mean of the data of M.E. Jenkin, T.P. Murrells, S.J. Shalliker, and G.D, Hayman, "Kinetics and product study of the self-reactions of allyl and allyl peroxy radicals," J. Chem. Soc. Faraday Trans. 89, 433-446 (1993); DOI: 10.1039/FT9938900433, A. Fahr, A.K. Nayak, and M.J. Kurylo, "The ultraviolet absorption cross sections of CH3I temperature dependent gas and liquid phase measurements," Chem. Phys. 197, 195-203 (1995); DOI: 10.1016/0301-0104(95)00172-K , and 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
, 235-330 nm, mean of the data of M.E. Jenkin, T.P. Murrells, S.J. Shalliker, and G.D, Hayman, "Kinetics and product study of the self-reactions of allyl and allyl peroxy radicals," J. Chem. Soc. Faraday Trans. 89, 433-446 (1993); DOI: 10.1039/FT9938900433, A. Fahr, A.K. Nayak, and M.J. Kurylo, "The ultraviolet absorption cross sections of CH3I temperature dependent gas and liquid phase measurements," Chem. Phys. 197, 195-203 (1995); DOI: 10.1016/0301-0104(95)00172-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, and 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, 12819-12829 (1997; DOI: 10.1029/97JD00530), 335-350 nm, mean of the data of A. Fahr, A.K. Nayak, and M.J. Kurylo, "The ultraviolet absorption cross sections of CH3I temperature dependent gas and liquid phase measurements," Chem. Phys. 197, 195-203 (1995); DOI: 10.1016/0301-0104(95)00172-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, and 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
, 355-365 nm, data of 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: 210-298 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)
--------------------------------
200 6.25 2.62
205 8.43 4.87
210 3.07 2.42
215 2.61 2.28
220 1.06 1.22
225 1.74 1.96
230 1.47 1.67
235 1.91 2.04
240 1.74 2.06
245 1.52 2.15
250 1.20 2.11
255 0.890 1.95
260 0.882 1.93
265 1.21 2.00
270 1.77 2.11
275 2.52 2.12
280 3.62 2.24
285 4.84 2.38
290 6.14 2.57
295 7.27 2.91
300 7.82 3.53
305 7.82 3.85
310 7.37 3.71
315 6.98 3.47
320 7.39 3.54
325 7.23 2.82
330 8.93 3.74
335 10.88 4.88
340 11.30 4.46
345 15.68 8.44
350 15.94 8.22
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 0.67
240 0.61
245 0.34
250 0.08
255 -0.10
260 -0.12
265 0.10
270 0.54
275 1.33
280 2.43
285 3.74
290 4.98
295 6.38
300 6.97
305 6.84
310 6.78
315 6.75
320 6.53
325 6.79
330 7.82
335 9.34
340 10.95
345 13.58
350 16.83
355 18.91
360 17.28
365 23.63 |