| Ion-Induced Fragmentation of Amino Acids: Effect of the Environment. | |
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MedLine Citation:
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PMID: 21370376 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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In general, radiation-induced fragmentation of small amino acids is governed by the cleavage of the CC(α) bond. We present results obtained with 300 keV Xe(20+) ions that allow molecules (glycine and valine) to be ionised at large distances without appreciable energy transfer. Also in the present case, the CC(α) bond turns out to be the weakest link and hence its scission is the dominant fragmentation channel. Intact ionised molecules are observed with very low intensities. When the molecules are embedded in a cluster of amino acids, a protective effect of the environment is observed. The fragmentation pattern changes: the CC(α) bond becomes more protected and stable amino acid cations are observed as fragments of the molecular clusters. Evidently, the molecular cluster acts as a "buffer" for the excess energy, capable of rapidly redistributing excess energy and charge. |
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Authors:
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Sylvain Maclot; Michael Capron; Rémi Maisonny; Arkadiusz Lawicki; Alain Méry; Jimmy Rangama; Jean-Yves Chesnel; Sadia Bari; Ronnie Hoekstra; Thomas Schlathölter; Bruno Manil; Lamri Adoui; Patrick Rousseau; Bernd A Huber |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-3-2 |
Journal Detail:
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Title: Chemphyschem : a European journal of chemical physics and physical chemistry Volume: - ISSN: 1439-7641 ISO Abbreviation: - Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-3-3 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100954211 Medline TA: Chemphyschem Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. |
Affiliation:
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CIMAP, CEA/CNRS/ENSICAEN, Université de Caen Basse-Normandie, Bd Henri Becquerel, BP 5133, F-14070 Caen cedex 5 (France), Fax: (+33) 2-31-45-47-14. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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