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Gas-phase study on uridine: Conformation and X-ray photofragmentation
KTH, School of Engineering Sciences (SCI), Physics, Atomic and Molecular Physics.ORCID iD: 0000-0001-7389-5501
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2015 (English)In: Journal of Chemical Physics, ISSN 0021-9606, E-ISSN 1089-7690, Vol. 142, no 19, 194303Article in journal (Refereed) Published
Abstract [en]

Fragmentation of RNA nucleoside uridine, induced by carbon 1s core ionization, has been studied. The measurements by combined electron and ion spectroscopy have been performed in gas phase utilizing synchrotron radiation. As uridine is a combination of d-ribose and uracil, which have been studied earlier with the same method, this study also considers the effect of chemical environment and the relevant functional groups. Furthermore, since in core ionization the initial core hole is always highly localized, charge migration prior to fragmentation has been studied here. This study also demonstrates the destructive nature of core ionization as in most cases the C 1s ionization of uridine leads to concerted explosions producing only small fragments with masses <= 43 amu. In addition to fragmentation patterns, we found out that upon evaporation the sugar part of the uridine molecule attains hexagonal form.

Place, publisher, year, edition, pages
2015. Vol. 142, no 19, 194303
Keyword [en]
Carbon, Functional groups, Gases, Ionization, Synchrotron radiation, Carbon 1s, Charge migration, Core hole, Core ionization, Effect of chemicals, Fragmentation patterns, Ion spectroscopies, Photofragmentation
National Category
Physical Sciences Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-169260DOI: 10.1063/1.4919878ISI: 000355006200020PubMedID: 26001457Scopus ID: 2-s2.0-84930226850OAI: oai:DiVA.org:kth-169260DiVA: diva2:821516
Funder
Swedish Research Council
Note

QC 20150615

Available from: 2015-06-15 Created: 2015-06-12 Last updated: 2017-12-04Bibliographically approved

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Rachlew, Elisabeth

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