Multiple electron capture from isolated protein poly-anions in collision with slow highly charged ions

Abstract : Collisions of 375 keV Xe25+ ions with trapped mass/charge selected poly-anions of the cytochrome C protein (similar to 12.5 kDa) were studied by coupling a linear quadrupole ion trap with low-energy ion beam facility. Tandem mass spectra were recorded for the protein precursor charge states ranging from -9 to -17. The present work reports the first study of slow highly charged ion collisions with poly-anions. A high signal to noise ratio allowed the study of the intensity of single and multiple electron removal by a projectile, as well as associated neutral losses, as a function of the target charge state. Relative single and double electron detachment cross sections were found to increase with increasing charge state of the precursor anion. The experimental findings are supported by the calculations of the total electron capture cross sections, based on the classical over-the-barrier model, restricted to a simple uniformly charged linear protein structure and a near-end electron capture.
Type de document :
Article dans une revue
Physical Chemistry Chemical Physics, Royal Society of Chemistry, 2017, 19 (30), pp.19691-19698. 〈10.1039/c7cp02075a〉
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-01607954
Contributeur : Archive Ouverte Prodinra <>
Soumis le : mardi 3 octobre 2017 - 00:27:10
Dernière modification le : jeudi 11 janvier 2018 - 06:27:34

Identifiants

Citation

A. R. Milosavljevic, Patrick Rousseau, A. Domaracka, B. A. Huber, Alexandre Giuliani. Multiple electron capture from isolated protein poly-anions in collision with slow highly charged ions. Physical Chemistry Chemical Physics, Royal Society of Chemistry, 2017, 19 (30), pp.19691-19698. 〈10.1039/c7cp02075a〉. 〈hal-01607954〉

Partager

Métriques

Consultations de la notice

38