Eur. Phys. J. E 2, 351-358
Molecular order in bilayer, anticlinic and ferroelectric smectic C mesophases
A. Carvalho1 - P.J. Sebastião1 - A. Ferraz1 - A.C. Ribeiro1,2 - H.T. Nguyen3
1 Centro de Física da Matéria Condensada, Av. Prof.
Gama Pinto 2, 1699-003 Lisboa, Portugal and Instituto Superior
Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
2 Institut de Physique et Chimie des Matériaux de Strasbourg, GMO, 23 rue du Loess, F-67037 Strasbourg Cedex, France
3 CNRS, Centre de Recherche Paul Pascal, Av. A. Schweitzer, F-33600 Pessac, France
Received 15 September 1999 and Received in final form 18 January 2000
In this work we present a proton NMR comparative study of the molecular order in the smectic (SC2), smectic (SC*) and anticlinic smectic C phases ( SCA* and SC?) of two liquid crystalline compounds. The second moments of the experimental proton NMR spectra are well explained taking into account two different molecular orientations models. From the analysis of our experimental results it was possible to estimate the tilt angles for all the smectic C phases studied in this work.
61.30.Gd Orientational order of liquid crystals; electric and magnetic field effects on order - 76.60.-k Nuclear magnetic resonance and relaxation
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