https://doi.org/10.1140/epjd/e2008-00076-4
Electron photodetachment of trapped doubly deprotonated angiotensin peptides. UV spectroscopy and radical recombination
1
Université Lyon 1, CNRS, LASIM UMR 5579, 43 bd. du 11 Novembre 1918, 69622 Villeurbanne Cedex, France
2
Université Lyon 1, CNRS, Sciences Analytiques, UMR 5180, 43 bd. du 11 Novembre 1918, 69622 Villeurbanne Cedex, France
Corresponding author: a rantoine@lasim.univ-lyon1.fr
Received:
28
January
2008
Revised:
29
February
2008
Published online:
18
April
2008
Trapped doubly deprotonated peptides are subjected to electron detachment when irradiated by a UV light. Electron photodetachment experiments as a function of the laser wavelength and laser fluence have been performed on two variants of angiotensin. The electron detachment yield was used to monitor the excited electronic spectrum of the trapped ions. Furthermore, the electron loss leads to the formation of radical ions. The radical recombination after collision activation is discussed.
PACS: 87.15.M- – Spectra of biomolecules; / 87.14.Ef – Peptides; / 34.50.Gb – Electronic excitation and ionization of molecules; intermediate molecular states / 33.80.Eh – Autoionization, photoionization, and photodetachment
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2008
