Measurements of the infrared absorption cross-sections of HCFC-141b (CH3CFCl2)

Detection of atmospheric trace gases by optical remote sensing techniques relies on the availability of molecular absorption spectra over a range of relevant temperatures. Absorption cross-sections of a pure vapour of the hydrochlorofluorocarbon HCFC-141b are reported at a resolution of 0.02 cm−1 for a range of temperatures between 223 and 283 K and a spectral range of 570-3100 cm−1. The integrated intensities of the nine main harmonic bands compare well with the data available from previous experimental studies and with theoretical calculations by ab initio and density functional theories.

► New infrared cross-sections of HCFC-141b are available between 223 and 283 K. ► The integrated intensities of the main bands compare well with the literature values. ► Calculations have been performed using ab initio and density functional theories. ► The theoretical intensities show a large dependence on the chosen basis sets.