CHED 953 |
We have investigated the electron-induced reactions of condensed CF2Cl2 at subexcitation electron energies under ultrahigh vacuum conditions. Results of post-irradiation temperature-programmed desorption experiments were used to quantify the electron-induced radiolysis products (C2F4Cl2, C2F3Cl3, and C2F2Cl4) of CF2Cl2 as functions of electron energy and electron fluence. While previous gas and condensed phase CF2Cl2 experiments show a resonance in the production/desorption of the F- ion at incident electron energies of 3 eV and 4 eV, respectively, our post-irradiation data demonstrate a resonance in the production of the complementary •CFCl2 radicals at 3 eV. Furthermore, our results, which do not show a resonance in the production of •CF2Cl radicals, are consistent with the absence of a resonance in the production/desorption of Cl-. While numerous studies have revealed chemical damage induced by dissociative electron attachment, our results represent one of the first studies to unambiguously demonstrate chemical synthesis induced by dissociative electron attachment. |
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Undergraduate Research Poster Session: Physical Chemistry
2:00 PM-4:00 PM, Monday, April 7, 2008 Morial Convention Center -- Hall A, Poster
Division of Chemical Education |