Nuclear magnetic resonance measurements of translational diffusion in the smectic A, nematic and isotropic phases of ethyl 4-(4′ acetoxybenzylidine) aminocinnamate (EABAC) are presented. These and high resolution, incoherent quasi-elastic neutron scattering results are interpreted in terms of anisotropic translational diffusion with a weak (11 kJ mole-1) periodic potential barrier to diffusion perpendicular to the smectic layers. A detailed analysis of the localized diffusive molecular motions in the smectic A and nematic mesophases has confirmed previous indications that there is an appreciable amplitude of motion (∼ 1 Å) parallel to the long molecular axes. This probably results from a coupling with the uniaxial rotational diffusion which the molecules undergo in both mesophases.
No takes yet. Share an insight, caveat, or question.
Richardson et al. (1980) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: