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+center dot center dot center dot O and Na+center dot center dot center dot pi 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.
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Submitted on : Thursday, August 25, 2016 - 11:21:01 AM
Last modification on : Wednesday, April 24, 2019 - 5:08:07 PM

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Valéria Lepère, Katia Le Barbu-Debus, Carine Clavaguera, Deborah Scuderi, Giovanni Piani, et al.. Chirality-dependent structuration of protonated or sodiated polyphenylalanines: IRMPD and ion mobility studies. Physical Chemistry Chemical Physics, Royal Society of Chemistry, 2016, 18 (3), pp.1807-18017. ⟨10.1039/c5cp06768e⟩. ⟨hal-01356198⟩

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