publication . Article . 2002

Infrared and mass spectral studies of proton irradiated H2O + CO2 ice: Evidence for carbonic acid

Marla H. Moore; R.K. Khanna;
Open Access
  • Published: 25 Jul 2002 Journal: Spectrochimica Acta Part A: Molecular Spectroscopy, volume 47, pages 255-262 (issn: 0584-8539, Copyright policy)
  • Publisher: Elsevier BV
Abstract
Abstract The effects of proton irradiation on mixed H2O + CO2 (1:1) ices at 20 K were investigated by infrared and mass spectroscopy. Infrared bands due to several radical (HCO, CO3) and molecular (CO) product species were identified. In addition, several new broad and complex i.r. features were observed. On slow warming, the broad features evolved into a 215–250 K residual film whose absorptions have been tentatively assigned to carbonic acid. This identification agrees with the spectral data for irradiated H2O + 13CO2 ice and the results of an approximate normal coordinate analysis.
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Subjects
free text keywords: Analytical chemistry, Irradiation, Carbonic acid, chemistry.chemical_compound, chemistry, Spectral data, Infrared, Carbon dioxide, Proton, Infrared spectroscopy, Mass spectrometry
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