CRYSTALLINE-LIQUID FERRO-ELECTRIC DERIVATIVES OF BRANCHED ACYCLIC ALPHA-CHLOROCARBOXYLIC ACIDS

Liquid crystalline ferroelectric derivatives of branched acyclic alpha-chlorocarboxylic acids of the general formula I wherein n=0 or 1; m=0 or 1, o=0 or 1; p=0 or 1 X=-COO-, -OOC-, or -CH2-CH2- Y=X, -CH2-, -N=N-, or -N=N(O)-, +TR R1 = (CH3)2CH, (CH3)2CHCH2, or C2H5CH(CH3) R2 = ClH2l+1, OClH2l+1, SC...

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Bibliographische Detailangaben
Hauptverfasser:	DIETRICH DEMUS, HORST ZASCHKE, WOLFGANG WEISSFLOG, KERSTIN WORM, KRISTINA MOHR, SASKIA KOHLER
Format:	Patent
Sprache:	eng
Schlagworte:	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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Beschreibung
Zusammenfassung:	Liquid crystalline ferroelectric derivatives of branched acyclic alpha-chlorocarboxylic acids of the general formula I wherein n=0 or 1; m=0 or 1, o=0 or 1; p=0 or 1 X=-COO-, -OOC-, or -CH2-CH2- Y=X, -CH2-, -N=N-, or -N=N(O)-, +TR R1 = (CH3)2CH, (CH3)2CHCH2, or C2H5CH(CH3) R2 = ClH2l+1, OClH2l+1, SClH2l+1, COClH2l+1, +TR OOCClH2l+1, COOClH2l+1, or NHClH2l+1 l = 1-12. It was discovered that, by reacting chiral alpha-chlorocarboxylic acids or alpha-chlorocarboxylic acid chlorides or bromides, synthesized from natural alpha-amino acids by reaction with nitric and hydrochloric acids, with appropriate hydroxy compounds directly or in the presence of strongly dehydrating substances, preferably carbodiimides, liquid crystalline ferroelectric substances of the general formula I are formed. The inventive substances by themselves, in mixtures with one another as well as with other liquid crystalline substances or substances which are not liquid crystalline, can form liquid crystalline ferroelectric phases, which make them suitable for use in displays.