title: Chirality-dependent structuration of protonated or sodiated polyphenylalanines: IRMPD and ion mobility studies.
abstract: 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.
authors.affiliation: Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Univ. Paris-Sud, Université Paris-Saclay, F-91405 Orsay, France. anne.zehnacker-rentien@u-psud.fr.
authors.forename: Valeria
authors.initials: V
authors.lastname: Lepere
authors.forename: Katia
authors.initials: K
authors.lastname: Le Barbu-Debus
authors.forename: Carine
authors.initials: C
authors.lastname: Clavaguéra
authors.forename: Debora
authors.initials: D
authors.lastname: Scuderi
authors.forename: Giovanni
authors.initials: G
authors.lastname: Piani
authors.forename: Anne-Laure
authors.initials: AL
authors.lastname: Simon
authors.forename: Fabien
authors.initials: F
authors.lastname: Chirot
authors.forename: Luke
authors.initials: L
authors.lastname: MacAleese
authors.forename: Philippe
authors.initials: P
authors.lastname: Dugourd
authors.forename: Anne
authors.initials: A
authors.lastname: Zehnacker