title: Electron attachment to trinitrotoluene (TNT) embedded in He droplets: complete freezing of dissociation intermediates in an extended range of electron energies.
abstract: Electron attachment to the explosive trinitrotoluene (TNT) embedded in Helium droplets (TNT@He) generates the non-decomposed complexes (TNT)(n)(-), but no fragment ions in the entire energy range 0-12 eV. This strongly contrasts the behavior of single TNT molecules in the gas phase at ambient temperatures, where electron capture leads to a variety of different fragmentation products via different dissociative electron attachment (DEA) reactions. Single TNT molecules decompose by attachment of an electron at virtually no extra energy reflecting the explosive nature of the compound. The complete freezing of dissociation intermediates in TNT embedded in the droplet is explained by the particular mechanisms of DEA in nitrobenzenes, which is characterized by complex rearrangement processes in the transient negative ion (TNI) prior to decomposition. These mechanisms provide the condition for effective energy withdrawal from the TNI into the dissipative environment thereby completely suppressing its decomposition.
authors.affiliation: Institut für Ionenphysik and Angewandte Physik, and Center of Molecular Biosciences Innsbruck, Universität Innsbruck, A-6020 Innsbruck.
authors.forename: Andreas
authors.initials: A
authors.lastname: Mauracher
authors.forename: Harald
authors.initials: H
authors.lastname: Schöbel
authors.forename: Filipe
authors.initials: F
authors.lastname: Ferreira da Silva
authors.forename: Achim
authors.initials: A
authors.lastname: Edtbauer
authors.forename: Christian
authors.initials: C
authors.lastname: Mitterdorfer
authors.forename: Stephan
authors.initials: S
authors.lastname: Denifl
authors.forename: Tilmann D
authors.initials: TD
authors.lastname: Märk
authors.forename: Eugen
authors.initials: E
authors.lastname: Illenberger
authors.forename: Paul
authors.initials: P
authors.lastname: Scheier
mesh_terms: D004583:Electrons; D005615:Freezing; D006371:Helium / Q000737:chemistry*; D013058:Mass Spectrometry; D014303:Trinitrotoluene / Q000737:chemistry*
chemical_list: D014303:Trinitrotoluene; D006371:Helium