Chirality-dependent structuration of protonated or sodiated polyphenylalanines: IRMPD and ion mobility studies

Ion mobility experiments are combined with Infra-Red Multiple Photon Dissociation (IRMPD) spectroscopy and quantum chemical calculations for assessing the role of chirality in the structure of protonated and sodiated di- or tetra-peptides. Sodiated systems show a strong chirality dependence of the c...

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Published in:Physical chemistry chemical physics : PCCP 2016-01, Vol.18 (3), p.187-1817
Main Authors: Lepere, Valeria, Le Barbu-Debus, Katia, Clavaguéra, Carine, Scuderi, Debora, Piani, Giovanni, Simon, Anne-Laure, Chirot, Fabien, MacAleese, Luke, Dugourd, Philippe, Zehnacker, Anne
Format: Article
Language:English
Subjects:
Analytical chemistry
Chemical Sciences
or physical chemistry
Theoretical and
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Summary:Ion mobility experiments are combined with Infra-Red Multiple Photon Dissociation (IRMPD) spectroscopy and quantum chemical calculations for assessing the role of chirality in the structure of protonated and sodiated di- or tetra-peptides. Sodiated systems show a strong chirality dependence of the competition between Na + O and Na + π interactions. Chirality effects are more subtle in protonated systems and manifest themselves by differences in the secondary interactions such hydrogen bonds between neutral groups or those involving the aromatic rings. Ion mobility experiments are combined with IRMPD spectroscopy for assessing the role of chirality in the structure of protonated and sodiated di- or tetra-peptides.
ISSN:1463-9076
1463-9084
DOI:10.1039/c5cp06768e