Dehalogenation of 5-halo-uracil molecules induced by 100 keV proton collisions

文献情報

出版日 2010-03-29

DOI 10.1039/B926803K

インパクトファクター 3.676

著者

Jean-Philippe Champeaux, Julien Rabier, Pierre Cafarelli, Martine Sence, Patrick Moretto-Capelle

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要旨

Neutral and cationic halogen loss of singly and doubly ionised 5-X-uracil (X = F, Cl, Br, I) after collisions with 100 keV protons have been studied in the gas phase. The rates of these dissociation channels are strongly dependant on the nature of the halogen substituent. It is very weak in the case of fluorine but is a dominant channel for iodine. Dissociation mechanisms are proposed for a number of significant channels associated to dehalogenation. It is suggested that some final ion products originate from specific processes. For instance, ion products of mass 38, 39 and 40 amu are very sensitive to the nature of the primarily ejected halogen and result from pathways associated to dehydrogenation and transient formation of the dehalogenated uracil cation.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

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