Title

Tailoring the physical properties of some high birefringence isothiocyanato-based liquid crystals

Authors

Authors

C. O. Catanescu; S. T. Wu;L. C. Chien

Comments

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Abbreviated Journal Title

Liq. Cryst.

Keywords

TRANSITION-TEMPERATURES; OPTICAL-PROPERTIES; DERIVATIVES; SUBSTITUENTS; Chemistry, Multidisciplinary; Crystallography; Materials Science, ; Multidisciplinary

Abstract

This paper describes the synthesis and characterization of several liquid crystal compounds having a tolane or terphenyl core structure and a high polarizability, isothiocyanato (NCS), terminal group. The synthesized compounds have high optical birefringerce (0.35 and 0.52), the highest being exhibited by the olefin-tolanes. Several eutectic mixtures are formulated and show improved properties over the single compounds, such as a broad nematic range, low melting temperature and relatively high clearing point. The birefringence of these mixtures is in the range 0.35-0.37. UV, viscosity and electro-optical measurements of the synthesized compounds are also reported. Dipole moment and polarizability calculations were made using CS-MOPAC and Hyperchem software computational programmes.

Journal Title

Liquid Crystals

Volume

31

Issue/Number

4

Publication Date

1-1-2004

Document Type

Article

Language

English

First Page

541

Last Page

555

WOS Identifier

WOS:000220616800011

ISSN

0267-8292

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