IUVSTA 15th International Vacuum Congress (IVC-15), AVS 48th International Symposium (AVS-48), 11th International Conference on Solid Surfaces (ICSS-11)
    Surface Science Monday Sessions
       Session SS1-MoM

Paper SS1-MoM3
Electron Stimulated Reactions of Chlorocarbons in Ice Films

Monday, October 29, 2001, 10:20 am, Room 120

Session: Aerosol and Related Chemistry
Presenter: H. Fairbrother, Johns Hopkins University
Authors: H. Fairbrother, Johns Hopkins University
A.J. Wagner, Johns Hopkins University
Correspondent: Click to Email

Electron stimulated reactions of chlorocarbons adsorbed in ice films are of importance in atmospheric processes as well as in understanding the mechanisms of glow discharge chlorocarbon remediation. We present results on the electron -induced reactivity of carbon tetrachloride (CCl@sub 4@) adsorbed in ice films at 100K studied using a combination of reflection absorption infrared spectroscopy and mass spectrometry. Both mass spectrometry and infrared measurements indicate that CCl@sub 4@ is converted to a mixture of phosgene (COCl@sub 2@), CO@SUB 2@ and HCl as a result of electron mediated reactions within the ice/chlorocarbon film, supported by separate experiments using @super 13@CCl@sub 4@. The product branching between COCl@sub 2@ and CO@SUB 2@ was found to be sensitive to the initial H@sub 2@O:CCl@sub 4@ mixture, with H@sub2@O-rich films favoring CO@SUB 2@ production. Results will also be presented on the electron-stimulated reactions of CHCl@sub 3@, CH@sub 2@Cl@sub 2@ and CH@sub 3@Cl adsorbed in ice films.