ORDER PARAMETERS FOR ISOMERIC PHENYL SUBSTITUTED ANTHRAQUINONE DYES DISSOLVED IN NEMATIC LIQUID CRYSTALS MIXTURES - INFLUENCE OF THE HOST.

Article abstract of DOI:10.1080/00268948308083693

Substitution of the anthraquinone ring system provided dyes suitable for guest-host applications. In general, one seeks to elongate the anthraquinonic system through a fourth ring. Different molecular structures have been proposed which all have similar ordering in the liquid crystalline host. Surprisingly, the 2-p-alkoxyphenyl substituted 1,5 dihydroxy-4, 8-diaminoanthraquinones have a higher order parameter in liquid crystalline mixtures of positive dielectric anisotropy made from cyano substituted moelcules. They lose this property in a system consisting of molecules without cyano groups at the terminii of the molecular axes. The properties of two isomeric substituted anthraquinone dyes in different hosts are compared in order to illustrate the considerable influence that dye-liquid crystal interactions may have on dye order parameter.

Full text of DOI:10.1080/00268948308083693

Molecular Crystals and Liquid Crystals
ISSN: 0026-8941 (Print) (Online) Journal homepage: http://www.tandfonline.com/loi/gmcl16
Order Parameters for Isomeric Phenyl Substituted
Anthraquinone Dyes Dissolved in Nematic Liquid
Crystals Mixtures-Influence of the Host
J. Cognard , T. Hieu Phan & N. Basturk
To cite this article: J. Cognard , T. Hieu Phan & N. Basturk (1983) Order Parameters for
Isomeric Phenyl Substituted Anthraquinone Dyes Dissolved in Nematic Liquid Crystals
Mixtures-Influence of the Host, Molecular Crystals and Liquid Crystals, 91:3-4, 327-340, DOI:
10.1080/00268948308083693
To link to this article: http://dx.doi.org/10.1080/00268948308083693
Published online: 28 Mar 2007.
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Date: 26 June 2016, At: 22:59