title: Inversion of self-diffusion anisotropy by chemical substitution in smectic A liquid crystals as evidenced by PGSE experiment combined with a quadrupole-coil rotation.
abstract: A technique of pulsed-field-gradient spin-echo (PGSE) NMR combined with a quadrupole-coil rotation was applied to the study of anisotropic self-diffusion in smectic A liquid crystals. Diffusion anisotropy was found to be inverted by chemical substitution of the terminal groups in homologous compounds: Namely, the diffusion across the layer is faster for the cyano compound, whereas the diffusion within the layer is faster for the trifluoromethoxy compound.
authors.affiliation: Institute for Molecular Science, Myodaiji, 444-8585, Okazaki, Japan.
authors.forename: Osamu
authors.initials: O
authors.lastname: Oishi
authors.forename: Seiichi
authors.initials: S
authors.lastname: Miyajima