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Mass Spectrometric Investigation of Anions Formed upon Free Electron Attachment to Nucleobase Molecules and Clusters Embedded in Superfluid Helium Droplets

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Denifl, Stephan [Leopold Franzens Universität Innsbruck] Zappa, Fabio [Leopold Franzens Universität Innsbruck] Lecointre, Julien [UCL]

Here we report the first mass spectrometric study of negative ions formed via free electron attachment(EA) to nucleobases (NBs) embedded in helium clusters. Pure and mixed clusters of adenine and thymine have been formed by pickup of isolated NB molecules by cold helium droplets. In contrast to EA of isolated molecules in the gas phase we observe a long-lived parent anion NB(-) and, in addition, parentcluster ions NB(-)(n) up to size n = 6. Moreover, we show that a low energy electron penetrating into a doped helium droplet causes efficient damage of the embedded nucleobases via resonant, site selective,dissociative electron attachment.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès libre
Publication date 2006
Language Anglais
Journal information "Physical Review Letters" - Vol. 97, no. 043201, p. 1-4 (2006)
Peer reviewed yes
Publisher American Physical Society ((United States) [S.l.])
issn 0031-9007
e-issn 1079-7114
Publication status Publié
Affiliations Leopold Franzens Universität Innsbruck - Institut fu¨r Ionenphysik und Angewandte Physik and Center for Molecular Biosciences Innsbruck
Leopold Franzens Universität Innsbruck - Institut für Ionenphysik und Angewandte Physik and Center for Molecular Biosciences Innsbruck
UCL - SC/PHYS - Département de physique
Links
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Bibliographic reference Denifl, Stephan ; Zappa, Fabio ; Lecointre, Julien ; et. al. Mass Spectrometric Investigation of Anions Formed upon Free Electron Attachment to Nucleobase Molecules and Clusters Embedded in Superfluid Helium Droplets. In: Physical Review Letters, Vol. 97, no. 043201, p. 1-4 (2006)
Permanent URL http://hdl.handle.net/2078.1/110222