OPTICALLY ACTIVE ESTER, ITS PRODUCTION, LIQUID CRYSTAL COMPOSITION CONTAINING THE SAME AND OPTICAL SWITCH USING THE SAME

• Main Authors: SATO KENICHI, OGINO KUMIKO, KUSUMOTO TETSUO, HIYAMA TAMEJIROU, MATSUI JUNKO
• Format: Patent
• Language: English
• Published: 06.04.1999
• Edition: 6
• Subjects: 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

PROBLEM TO BE SOLVED: To obtain the subject novel compound that displays stabilized chiral smectic C phase in a broad temperature range near the room temperature as well as a large spontaneous polarization, shows a large inclination angle and can develop excellent rapid response. SOLUTION: This compound is an optically active ester represented by formula I (R is a 1-18 straight chain alkyl; R is a 2-18C straight chain alkyl; X is N or CH; Y is F or H; * is an asymmetric carbon), typically 2 (3-fluoro-4- hexyloxyphenyl)-5-(4-((S)-2-fluoro-2-methyldecanoyloxy)phenyl)pyrimidine. The compound of formula I is prepared by reaction of a phenol of formula II with an optically active carboxylic acid of formula III. The compound of formula I is admixed to a base liquid crystal in a range of 1-60 wt.% and the resultant liquid crystal composition can develop excellent effect as a material for the elements relating to optoelectronics.