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

    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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