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Molecular order in bilayer,anticlinic and ferroelectric smectic C mesophases |
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| Authors: | A Carvalho PJ Sebastião A Ferraz AC Ribeiro HT Nguyen |
| Institution: | (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, PT;(2) Institut de Physique et Chimie des Matériaux de Strasbourg, GMO, 23 rue du Loess, F-67037 Strasbourg Cedex, France, FR;(3) CNRS, Centre de Recherche Paul Pascal, Av. A. Schweitzer, F-33600 Pessac, France, FR |
| Abstract: | In this work we present a proton NMR comparative study of the molecular order in the smectic C2 (), smectic C^* () and anticlinic smectic C phases ( and ) 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. Received 15 September 1999 and Received in final form 18 January 2000 |
| Keywords: | PACS 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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