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.
Undergraduate Research Poster Session: Physical Chemistry
2:00 PM-4:00 PM, Monday, April 7, 2008 Morial Convention Center -- Hall A, Poster