Orthoconic antiferroelectric liquid crystals containing a terphenyl rigid core
- 1 June 2007
- journal article
- research article
- Published by Taylor & Francis Ltd in Phase Transitions
- Vol. 80 (6-7), 771-780
- https://doi.org/10.1080/01411590701340375
Abstract
Four homologous series of orthoconic (45 degree tilt) antiferroelectric liquid crystals, containing either a terphenyl or fluorosubstituted terphenyl core as mesogenic unit, have been synthesized and their mesomorphic behaviour investigated by the DSC and polarized light microscopy were discussed. X-ray diffraction studies have shown that above the ferroelectric smectic C* phase or antiferroelectric there was a de Vries-type smectic A phase. Some correlations between phase transition temperatures and positions of fluorosubstitution of rigid core are discussed. Temperature dependence of the helical pitch was measured for three different cores.Keywords
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