Selectivity in fragmentation of N-methylacetamide after resonant K-shell excitation (Articolo in rivista)

Type
Label
  • Selectivity in fragmentation of N-methylacetamide after resonant K-shell excitation (Articolo in rivista) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1039/c4cp01067a (literal)
Alternative label
  • Salen, Peter; Kaminska, Magdalena; Squibb, Richard J.; Richter, Robert; Alagia, Michele; Stranges, Stefano; van der Meulen, Peter; Eland, John H. D.; Feifel, Raimund; Zhaunerchyk, Vitali (2014)
    Selectivity in fragmentation of N-methylacetamide after resonant K-shell excitation
    in PCCP. Physical chemistry chemical physics (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Salen, Peter; Kaminska, Magdalena; Squibb, Richard J.; Richter, Robert; Alagia, Michele; Stranges, Stefano; van der Meulen, Peter; Eland, John H. D.; Feifel, Raimund; Zhaunerchyk, Vitali (literal)
Pagina inizio
  • 15231 (literal)
Pagina fine
  • 15240 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 16 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 10 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 29 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Stockholm University; Uppsala University; Jan Kochanowski University; University of Gothenburg; Elettra Sincrotrone Trieste; IOM CNR Tasc; Sapienza University Rome; University of Oxford (literal)
Titolo
  • Selectivity in fragmentation of N-methylacetamide after resonant K-shell excitation (literal)
Abstract
  • The fragmentation pattern of the peptide model system, N-methylacetamide, is investigated using ion time-of-flight (TOF) spectroscopy after resonant K-shell excitation. Corresponding near-edge X-ray absorption fine structure (NEXAFS) spectra recorded at high resolution at the C1s, N1s and O1s edges are presented. Analysis of the ion TOF data reveals a multitude of fragmentation channels and dissociation pathways. Comparison between the excitation of six different resonances in the vicinity of the C1s, N1s and O1s edges suggests evidence for site-selective bond breaking. In particular the breaking of the peptide bond and the N-C-alpha bond show a clear correlation with resonant excitation at the N1s edge. Also, stronger tendencies towards site-selective bond breaking are found for the generation of single ions compared with ion pairs. Analysis of angular distributions of ions from breakage of the peptide bond yields a fragmentation time of <400 fs. (literal)
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