Liquid crystalline mixtures having a chiral tilted smectic phase

Details Liquid crystalline mixtures having a chiral tilted smectic phase Liquid crystalline mixtures having a chiral tilted smectic phase

1993-06-09

1994-10-18

Wu, Shean

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229901, 25229961, 544242, 544298, 544335, 546290, 546340, 546346, C09K 1930, C09K 1934, C07D23902, C07D21172

Patent

active

053565630

ABSTRACT:
Optically active compounds of the formula ##STR1## wherein m stands for the number 1 and R.sup.2 is an unsubstituted or halogen-substituted alkyl or alkenyl group in which optionally one methylene group is replaced by oxygen and/or optionally one methylene group is replaced by an ester group --COO-- or --OOC--; or m stands for the number 0 or 1 and R.sup.2 denotes a group of the formula ##STR2## R.sup.1 and R.sup.3 each independently represent an alkyl or alkenyl group in which optionally one methylene group is replaced by oxygen; Z.sup.1, Z.sup.2 and Z.sup.3 each independently are a single covalent bond, --CH.sub.2 O--, --OCH.sub.2 --, --CH.sub.2 CH.sub.2 --, --COO-- or --OOC--; n stands for the number 0 or 1; rings A.sup.1 and A.sup.2 each independently are unsubstituted or halogen, cyano and/or methyl-substituted 1,4-phenylene in which optionally 1 CH group or 2 CH groups is/are replaced by nitrogen; and C.sup.* denotes a chiral carbon atom; with the proviso that simultaneously R.sup.l does not are an alkyl group, m and n do not are the number 1, Z.sup.1 does not are the group --CH.sub.2 CH.sub.2 -- or --CH.sub.2 O-- and ring A.sup.1, Z.sup.2, ring A.sup.2 and R.sup.2 together do not are 4-(5-alkyl-2-pyrimidinyl)-phenyl, their preparation, liquid crystalline mixtures which contain these compounds and their use for electro-optical purposes.

REFERENCES:
patent: 4592858 (1986-06-01), Higuchi et al.
patent: 4723005 (1988-02-01), Huynh-Ba et al.
patent: 4753752 (1988-06-01), Raynes et al.
patent: 4855429 (1989-08-01), Heppke et al.
patent: 4867903 (1990-09-01), Nohira et al.
patent: 4873018 (1989-10-01), Nohira et al.
patent: 4961876 (1990-10-01), Demus et al.
patent: 5100577 (1992-03-01), Buchecker et al.
patent: 5244597 (1993-09-01), Buchecker et al.
Buchecker et al., "Some new .alpha.-fluoro esters incorporating a cyclohexane ring as chiral dopants for ferroelectric mixtures", Liquid Crystals, vol. 8, No. 2, pp. 217-227 (1990).
Stegmeyer et al., "Concentration dependence of the ferroelectric properties and the effect of a local field", Liquid Crystals, vol. 3, pp. 295-310 (1991).
Derwent Abstract 87-250289 (1987) for WO 87/05017.
Derwent Abstract 87-158864/23 (1987) for EP 225 195.

Affiliated with

Also associated with

Rating

Liquid crystalline mixtures having a chiral tilted smectic phase does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Liquid crystalline mixtures having a chiral tilted smectic phase, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid crystalline mixtures having a chiral tilted smectic phase will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2370259