Chemistry induced by low-energy electrons in condensed multilayers of ammonia and carbon dioxide

M. Bertin; I. Martin; F. Duvernay; P. Theule; J. B. Bossa; F. Borget; E. Illenberger; A. Lafosse; T. Chiavassa; R. Azria

doi:10.1039/B812796D

Chemistry induced by low-energy electrons in condensed multilayers of ammonia and carbon dioxide

M. Bertin,^ab I. Martin,^abc F. Duvernay,^d P. Theule,^d J. B. Bossa,^d F. Borget,^d E. Illenberger,^c A. Lafosse,*^ab T. Chiavassa^d and R. Azria^ab

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* Corresponding authors

^a Univ Paris-Sud, UMR 8625, Laboratoire des Collisions Atomiques et Moléculaires (FR LUMAT), Orsay, France
E-mail: anne.lafosse@u-psud.fr

^b CNRS, Orsay, France

^c Institut für Chemie und Biochemie-Physikalische und Theoretische Chemie, Freie Universität Berlin, Takustrasse 3, Berlin, Germany

^d Physique des Interactions Ioniques et Moléculaires, UMR 6633, Université de Provence et CNRS, Centre de St Jérôme, case 252, Marseille Cedex 20, France

Abstract

We have investigated by means of HREEL spectroscopy electron induced reactivity in a binary CO₂ : NH₃ ice mixture. It was shown that the interaction of low energy electrons (9–20 eV) with such mixtures induces the synthesis of neutral carbamic acid NH₂COOH and that flashing the sample at 140 K induces the formation of ammonium carbamate. The products have been assigned by FTIR spectroscopy of a CO₂ : NH₃ mixture heated from 10 K to 240 K. A mechanism involving dissociation of NH₃ molecules into NH₂˙ and H˙ radicals is proposed to explain the product formation.

Physical Chemistry Chemical Physics

Chemistry induced by low-energy electrons in condensed multilayers of ammonia and carbon dioxide

Abstract

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Chemistry induced by low-energy electrons in condensed multilayers of ammonia and carbon dioxide

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