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Dissociative Electron Attachment to DNA Bases Near Absolute Zero Temperature: Freezing Dissociation Intermediates
Author(s) -
Denifl Stephan,
Zappa Fabio,
Mauracher Andreas,
Ferreira da Silva Filipe,
Bacher Arntraud,
Echt Olof,
Märk Tilmann D.,
Bohme Diethard K.,
Scheier Paul
Publication year - 2008
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200800245
Subject(s) - thymine , dissociation (chemistry) , nucleobase , chemistry , dissociative , ion , molecule , electron , dehydrogenation , photochemistry , dna , chemical physics , organic chemistry , physics , medicine , quantum mechanics , pharmacology , biochemistry , catalysis
Cold dissociation: Thymine and adenine are embedded within extremely cold superfluid 4 He droplets (see picture) and exposed to electrons with energies up to 15 eV. The only significant dissociative attachment channel is formation of a dehydrogenated nucleobase anion. This differs dramatically from the many different anionic products observed with isolated molecules at 400 K.