Quadrupolar interaction study of various cations confined in porous charged polymer film of sPI ionomers.
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.
Rollet
Anne-Laure
AL
Centre de Recherche sur les Matériaux à Haute Température, CNRS, UPR 4212, 45071 Orléans cedex 02, France.
Porion
Patrice
P
Delville
Alfred
A
Diat
Olivier
O
Gebel
Gérard
G
D016880:Anisotropy; D002412:Cations / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008567:Membranes, Artificial; D011108:Polymers / Q000737:chemistry*; D016062:Porosity
D002412:Cations; D008567:Membranes, Artificial; D011108:Polymers