title: Bond selective dissociative electron attachment to thymine.
abstract: Free-electron attachment to thymine and partially deuterated thymine, where D replaces H at all carbon atoms, is studied in the electron energy range from about 0 to 15 eV. The formation of fragment anions that are formed by the loss of one or two H (D) atoms is analyzed as a function of the incident electron energy using a crossed electron/neutral beam apparatus in combination with a quadrupole mass spectrometer. By using partially deuterated thymine and quantum-chemical calculation a bond selectivity for the loss of one and two hydrogen atoms is observed that is determined only by the kinetic energy of the incident electron.
authors.affiliation: Institut für Ionenphysik, The Center of Molecular Bioscience Innsbruck, Leopold Franzens Universität, Technikerstrasse 25, A-6020 Innsbruck, Austria. sylwia.ptasinska@uibk.ac.at
authors.forename: S
authors.initials: S
authors.lastname: Ptasińska
authors.forename: S
authors.initials: S
authors.lastname: Denifl
authors.forename: B
authors.initials: B
authors.lastname: Mróz
authors.forename: M
authors.initials: M
authors.lastname: Probst
authors.forename: V
authors.initials: V
authors.lastname: Grill
authors.forename: E
authors.initials: E
authors.lastname: Illenberger
authors.forename: P
authors.initials: P
authors.lastname: Scheier
authors.forename: T D
authors.initials: TD
authors.lastname: Märk
mesh_terms: D000838:Anions; D002244:Carbon / Q000737:chemistry; D002627:Chemistry, Physical / Q000379:methods*; D003903:Deuterium / Q000737:chemistry; D004563:Electrochemistry / Q000379:methods; D004583:Electrons; D006859:Hydrogen / Q000737:chemistry; D006860:Hydrogen Bonding; D007700:Kinetics; D013058:Mass Spectrometry; D008956:Models, Chemical; D008968:Molecular Conformation; D016011:Normal Distribution; D011789:Quantum Theory; D013941:Thymine / Q000737:chemistry*
chemical_list: D000838:Anions; D002244:Carbon; D006859:Hydrogen; D003903:Deuterium; D013941:Thymine