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dc.contributor.authorAlmeida, D.-
dc.contributor.authorAntunes, R.-
dc.contributor.authorMartins, G.-
dc.contributor.authorEden, S.-
dc.contributor.authorFerreira da Silva, F.-
dc.contributor.authorNunes, Y.-
dc.contributor.authorGarcía, Gustavo-
dc.contributor.authorLimão-Vieira, P.-
dc.identifierdoi: 10.1039/c1cp21340g-
dc.identifierissn: 1463-9076-
dc.identifier.citationPhysical Chemistry Chemical Physics 13: 15657- 15665 (2011)-
dc.description.abstractIon-pair formation has been studied in hyperthermal (30-100 eV) neutral potassium collisions with gas phase thymine (C5H6N 2O2) and uracil (C4H4N 2O2). Negative ions formed by electron transfer from the alkali atom to the target molecule were analysed by time-of-flight (TOF) mass spectrometry. The most abundant product anions are assigned to CNO- and (U-H)-/(T-H)- and the associated electron transfer mechanisms are discussed. Special emphasis is given to the enhancement of ring breaking pathways in the present experiments, notably CNO- formation, compared with free electron attachment measurements. This journal is © the Owner Societies.-
dc.description.sponsorshipDA and RA acknowledge the Portuguese Foundation for Science and Technology (FCT-MCTES) for post-graduate scholarships SFRH/BD/32271/2006 and SFRH/BD/61645/ 2009, respectively, and FFS for the post-doctoral scholarship SFRH/BPD/68979/2010. m CSIC, Madrid for the Spanish–Portuguese Project HP2006-0042; Ministerio de Ciencia e Innovacio´n (project FIS2009-10245), Spain is also acknowledged. SE acknowledges an EPSRC Life Sciences Interface Fellowship, an FP7 Marie Curie Reintegration Grant (ERG), and the ITS-LEIF exchange program. Some of this work forms part of the EU/ESF COST Actions Electron Controlled Chemical Lithography (ECCL) CM0601, Astrochemistry CM0805 and Nano IBCT–MP1002.-
dc.publisherRoyal Society of Chemistry (UK)-
dc.titleElectron transfer-induced fragmentation of thymine and uracil in atom-molecule collisions-
dc.description.versionPeer Reviewed-
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