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Abstract
Recent multi-photon ionization (MPI) experiments on uracil revealed a fragment ion at m/z 84 that was proposed as a potential marker for ring opening in the electronically excited neutral molecule. The present MPI measurements on deuterated uracil identify the fragment as C3H4N2O+ (uracil+ less CO), a plausible dissociative ionization product from the theoretically predicted open-ring isomer. Equivalent measurements on thymine do not reveal an analogous CO loss channel, suggesting greater stability of the excited DNA base. MPI and electron impact ionization experiments have been carried out on uracil-adenine clusters in order to better understand the radiation response of uracil within RNA. Evidence for C3H4N2O+ production from multi-photon-ionized uracil-adenine clusters is tentatively attributed to a significant population of π-stacked configurations in the neutral beam.
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Authors (8)
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M. Ryszka
- Universitet Norte Dame Radiation Laboratory
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R. Pandey
- The Open University Department of Physical Sciences
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C. Rizk
- Lebanese University Faculty of Science
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J. Tabet
- Lebanese University Faculty of Science
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B. Barc
- Milton Keynes College Faculty of Engineering
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N.j. Mason
- the Open University Department of Physical Sciences
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S. Eden
- The Open University (UK) Department of Physical Sciences
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Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
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INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
no. 396,
pages 48 - 54,
ISSN: 1387-3806 - Language:
- English
- Publication year:
- 2016
- Bibliographic description:
- Ryszka M., Pandey R., Rizk C., Tabet J., Barc B., Dampc M., Mason N., Eden S.: Dissociative multi-photon ionization of isolated uracil and uracil-adenine complexes// INTERNATIONAL JOURNAL OF MASS SPECTROMETRY. -Vol. 396, (2016), s.48-54
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.ijms.2015.12.006
- Verified by:
- Gdańsk University of Technology
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