Bond selective dissociative electron attachment to thymine.
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.
Ptasińska
S
S
Institut für Ionenphysik, The Center of Molecular Bioscience Innsbruck, Leopold Franzens Universität, Technikerstrasse 25, A-6020 Innsbruck, Austria. sylwia.ptasinska@uibk.ac.at
Denifl
S
S
Mróz
B
B
Probst
M
M
Grill
V
V
Illenberger
E
E
Scheier
P
P
Märk
T D
TD
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*
D000838:Anions; D002244:Carbon; D006859:Hydrogen; D003903:Deuterium; D013941:Thymine