ACHIRAL FLUORINE-CONTAINING LIQUID CRYSTALS

Achiral fluorine-containing liquid crystal compounds are provided. These compounds are of the general formula I where M, N and P are each independently a, b, and c are independently zero or an integer of from 1 to 3 with the proviso that the sum of a + b + c be at least 2; each A and B are non-direc...

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Bibliographic Details
Main Author JANULIS, EUGENE P
Format Patent
LanguageEnglish
French
Published 20.06.2000
Edition6
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
ADHESIVES
CHEMISTRY
DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING
DYES
FREQUENCY-CHANGING
HETEROCYCLIC COMPOUNDS
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
NON-LINEAR OPTICS
OPTICAL ANALOGUE/DIGITAL CONVERTERS
OPTICAL LOGIC ELEMENTS
OPTICS
ORGANIC CHEMISTRY
PAINTS
PHYSICS
POLISHES
TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Summary:Achiral fluorine-containing liquid crystal compounds are provided. These compounds are of the general formula I where M, N and P are each independently a, b, and c are independently zero or an integer of from 1 to 3 with the proviso that the sum of a + b + c be at least 2; each A and B are non-directionally and each independently nil, , -CH2CH2-, -CH=CH-, -C~C-, CH=N-, -CH2-O-, -CO-or -O-; each X, Y and Z are independently -H, -Cl, -F, -Br, -I, -OH, 2/3 -OCH3, -CH3, -CN or -NO2; each l, m and n are independently zero or an integer of 1 to 4, D is , -O-(CH2)r-, -(CH2)r-, -OSO2-, -SO2-, -SO2-(CH2)r-, -O(CH2)r-O-(CH2)r, where r and r' are independently 1 to 20, and p is 0 to 4; R is -O-C4H2q-O-C q'H2q'+l' -C q H2q-O-C q'H2q'+l' -C q H2q-R', -O-c q H2q-R', where R' is -Cl, -F, -CF3, -NO2, -CN, -H, and q and q' are independently 1 to 20, and R can be straight chain or branched, and R f is C q F2q+1 where q and q' are independently 1 to 20. The compounds comprise a fluorocarbon terminal portion and a hydrocarbon or another fluorocarbon terminal portion, the terminal 3/3 portions being connected by a central core, the compounds having smectic mesophases or having latent smectic mesophases. The compounds are useful in smectic liquid crystal display devices bath alone and in mixtures with other materials. Also provided is a process for preparing these compounds.
Bibliography:Application Number: CA19890609228