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
pedros@lince.cii.fc.ul.pt,
tinh@crpp.u-bordeaux.fr
Received 15 September 1999 and Received in final form 18 January 2000
Abstract
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.
PACS
61.30.Gd Orientational order of liquid crystals; electric and
magnetic field effects on order
- 76.60.-k Nuclear magnetic resonance and relaxation
Copyright EDP Sciences, Società Italiana di Fisica, Springer-Verlag
