NUCLEAR MAGNETIC RELAXATION AND SELF DIFFUSION IN SOME LIQUID CRYSTALS SHOWING SMECTIC POLYMORPHISMReportar como inadecuado




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Abstract : Nuclear magnetic relaxation times T1Z and T1D and the self diffusion coefficients D|| and D⊥ have been measured in dependence of temperature in ethyl p-p-ethoxybenzylidene-amino-cinnamate EBAC and TBBA. The results show that the diffusion process contributes to the relaxation rates in the smectic A, C and H phases of TBBA and in the smectic A and B phases of EBAC. Evidence is given that the diffusion perpendicular to the molecular director is liquid like in the A and C phases and of a pseudolattice jump type in the B phase of EBAC.





Autor: G. Krüger H. Spiesecke R. Van Steenwinkel

Fuente: https://hal.archives-ouvertes.fr/



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