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Title: VUV action spectroscopy of protonated leucine-enkephalin peptide in the 6-14 eV range

We have studied the Vacuum Ultraviolet (VUV) photodissociation of gas-phase protonated leucine-enkephalin peptide ion in the 5.7 to 14 eV photon energy range by coupling a linear quadrupole ion trap with a synchrotron radiation source. We report VUV activation tandem mass spectra at 6.7, 8.4, and 12.8 eV photon energies and photodissociation yields for a number of selected fragments. The obtained results provide insight into both near VUV radiation damage and electronic properties of a model peptide. We could distinguish several absorption bands and assign them to particular electronic transitions, according to previous theoretical studies. The photodissociation yields appear to be very different for the various observed fragmentation channels, depending on both the types of fragments and their position along the peptide backbone. The present results are discussed in light of recent gas-phase spectroscopic data on peptides.
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [4] ;  [1] ;  [5]
  1. Institute of Physics Belgrade, University of Belgrade, Pregrevica 118, 11080 Belgrade (Serbia)
  2. INRA, UMR1324 Centre des Sciences du Goût et de l’Alimentation, F-21000 Dijon (France)
  3. SOLEIL, l’Orme des Merisiers, St Aubin, BP48, 91192 Gif sur Yvette Cedex (France)
  4. (France)
  5. (United States)
Publication Date:
OSTI Identifier:
22493410
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 143; Journal Issue: 24; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ABSORPTION; COUPLING; DISSOCIATION; ENKEPHALINS; EV RANGE; FAR ULTRAVIOLET RADIATION; FRAGMENTATION; IONS; LEUCINE; MASS SPECTRA; PHOTOLYSIS; PHOTONS; RADIATION EFFECTS; SYNCHROTRON RADIATION SOURCES; TRAPS; VISIBLE RADIATION; YIELDS