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Selectivity in frag...
Selectivity in fragmentation of N-methylacetamide after resonant K-shell excitation
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Salen, Peter (författare)
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Kaminska, Magdalena (författare)
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Squibb, Richard J. (författare)
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visa fler...
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Richter, Robert (författare)
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Alagia, Michele (författare)
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Stranges, Stefano (författare)
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van der Meulen, Peter (författare)
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Eland, John H. D. (författare)
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Feifel, Raimund (författare)
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Zhaunerchyk, Vitali (författare)
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visa färre...
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(utgivare)
- 2014
- 2014
- Engelska.
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Ingår i: Physical Chemistry, Chemical Physics - PCCP. - 1463-9076. ; 16:29, 15231-15240
Abstract
Ämnesord
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- 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.
Ämnesord
- Natural Sciences (hsv)
- Physical Sciences (hsv)
- Naturvetenskap (hsv)
- Fysik (hsv)
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Salen, Peter
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Kaminska, Magdal ...
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Squibb, Richard ...
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Richter, Robert
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Alagia, Michele
-
Stranges, Stefan ...
-
visa fler...
-
van der Meulen, ...
-
Eland, John H. D ...
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Feifel, Raimund
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Zhaunerchyk, Vit ...
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visa färre...
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