science-softCon uv/vis+ photochemistry database;	www.photochemistry.org; (C) science-softCon 2019

Substance: diiodomethane				Other Names: 

Formula: CH2I2						CAS-No.: 75-11-6

Study: uv absorption coefficients


Authors: C.M. Roehl, J.B. Burkholder, G.K. Moortgat, A.R. Ravishankara, P.J. Crutzen

Title: Temperature Dependence of UV Absorption Cross Sections and Atmospheric Implications of Several Alkyl Iodides

Journal/Source: J. Geophys. Res., 102 (D11), 12819-12829, (1997); DOI: 10.1029/97JD00530


Data: table, diagram

Energy/Wavelength range: ~ 205 - 380 nm

Resolution:

Temperature: 273 K; 298 K

Temperature dependence: yes

Pressure/Concentration:

Phase: gas

pH:


Comments: The ultraviolet absorption spectra of a number of alkyl iodides which have been found in the troposphere, CH3I, C2H5I, CH3CH2CH2I, CH3CHICH3, CH2I2, and CH2ClI, have been measured over the wavelength range 200-380 nm and at temperatures between 298 and 210 K. The absorption spectra of the monoiodides CH3I, C2H5I, CH3CH2CH2I, and CH3CHICH3 are nearly identical in shape and magnitude and consist of single broad bands centered near 260 nm. 

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