title: Quadrupolar interaction study of various cations confined in porous charged polymer film of sPI ionomers.
abstract: The structure of a sulfonated polyimide (sPI) ionomer membranes was investigated via the transport properties of various confined cations (7Li+, 23Na+, 87Rb+, 133Cs+). Their NMR spectra show large residual quadrupolar splitting depending on the orientation of the film in the static magnetic field B0. This behavior is the fingerprint of a macroscopic nematic ordering of charged interfaces. This is also confirmed by the anisotropy of the self-diffusion tensor measured by 1H and 7Li PGSE experiments on N(CH3)4+ and Li+ cations, respectively.
authors.affiliation: Centre de Recherche sur les Matériaux à Haute Température, CNRS, UPR 4212, 45071 Orléans cedex 02, France.
authors.forename: Anne-Laure
authors.initials: AL
authors.lastname: Rollet
authors.forename: Patrice
authors.initials: P
authors.lastname: Porion
authors.forename: Alfred
authors.initials: A
authors.lastname: Delville
authors.forename: Olivier
authors.initials: O
authors.lastname: Diat
authors.forename: Gérard
authors.initials: G
authors.lastname: Gebel
mesh_terms: D016880:Anisotropy; D002412:Cations / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008567:Membranes, Artificial; D011108:Polymers / Q000737:chemistry*; D016062:Porosity
chemical_list: D002412:Cations; D008567:Membranes, Artificial; D011108:Polymers