Synthesis and physical properties of high birefringence phenylacetylene liquid crystals containing a cyclohexyl group

Citation
C. Sekine et al., Synthesis and physical properties of high birefringence phenylacetylene liquid crystals containing a cyclohexyl group, LIQ CRYST, 28(10), 2001, pp. 1495-1503
Citations number
26
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
LIQUID CRYSTALS
ISSN journal
0267-8292 → ACNP
Volume
28
Issue
10
Year of publication
2001
Pages
1495 - 1503
Database
ISI
SICI code
0267-8292(200110)28:10<1495:SAPPOH>2.0.ZU;2-F
Abstract
We have synthesized new phenylacetylene-based liquid crystals containing a cyclohexyl or cyclohexylethyl group and evaluated their physical properties in order to develop a range of materials having high value of birefringenc e. The cyclohexyl-containing compounds exhibited nematic behaviour near roo m temperature and moderate values of Deltan of around 0.3. The cyclohexylet hyl-containing compounds had a very wide nematic range with a high T-NI and very high values of Deltan of over 0.4. They also exhibited low viscositie s. The order parameter was not affected by introducing either a cyclohexyl or a cyclohexylethyl group and the values of Deltan based on calculated pol arizabilities were obtained experimentally.