NEW ESTER COMPOUND, LIQUID CRYSTAL COMPOSITION CONTAINING THE SAME COMPOUND AND OPTICAL SWITCHING ELEMENT

• Main Authors: SATO KENICHI, OGINO KUMIKO, KUSUMOTO TETSUO, HIYAMA TAMEJIROU, MATSUI JUNKO
• Format: Patent
• Language: English
• Published: 06.04.1999
• Edition: 6
• 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; 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 a new compound exhibiting chiral smectic C phase in broad temperature range close to room temperature and capable of providing a liquid crystal composition capable of carrying out high speed response when mixed in a single body or a base liquid crystal. SOLUTION: This compound is represented by formula I [(x) is 1-3; (n) is 1-15; R is 2-18C straight chain alkyl; *C is an asymmetric carbon), e.g. 4'-[4 (6,6,6-trifluorohexyl)benzoyloxy]-4 biphenyl (S)-2-fluoro-2-methylheptanoate. The compound of formula I is obtained by esterifing, e.g. 4-benzyloxy-4'- hydroxybiphenyl with an optically active 2-fluoro-2-methylalkanoic acid of formula II, subjecting the resultant ester compound to debenzylation and then, esterifying the resultant debenzylated compound with a substituted benzoic acid of formula III.