Electron stimulated desorption of H⁻ ions from condensed acetic acid

Bertin, M.; Caceres, D.; Lafosse, A.; Azria, R.; Davis, M. P.; Mason, N. J.; Balog, R. and Illenberger, E. (2007). Electron stimulated desorption of H⁻ ions from condensed acetic acid. Chemical Physics Letters, 433(4-6) pp. 292–295.

DOI: https://doi.org/10.1016/j.cplett.2006.11.052

Abstract

The interaction between low energy electrons and condensed acetic acid has been investigated considering H⁻ and D⁻ ions Electron Stimulated Desorption from the three isotopic forms CD₃COOD, CD₃COOH and CH₃COOD. For all isotopic forms the yields of desorbing H⁻(D⁻) ions are nearly identical, peaking at an incident electron energy of 9.75 eV, and no differences are observed in H⁻(D⁻) kinetic energy distributions. The intensities of H⁻ and D⁻ ion signals from CD₃COOH and CH₃COOD suggest a selectivity in the production of ions, that seems more efficient from the acid group –COOH(D) than from the methyl group –CH(D)₃ of these molecules.

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