VUV action spectroscopy of protonated leucine-enkephalin peptide in the 6-14 eV range
- Institute of Physics Belgrade, University of Belgrade, Pregrevica 118, 11080 Belgrade (Serbia)
- INRA, UMR1324 Centre des Sciences du Goût et de l’Alimentation, F-21000 Dijon (France)
- SOLEIL, l’Orme des Merisiers, St Aubin, BP48, 91192 Gif sur Yvette Cedex (France)
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.
- OSTI ID:
- 22493410
- Journal Information:
- Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 24 Vol. 143; ISSN JCPSA6; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
A tandem mass spectrometer for crossed-beam irradiation of mass-selected molecular systems by keV atomic ions
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journal | April 2018 |
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