Ferroelectric liquid crystal compounds containing halogenated co

Details Ferroelectric liquid crystal compounds containing halogenated co Ferroelectric liquid crystal compounds containing halogenated co

1993-01-19

1995-06-06

Wu, Shean

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229901, 25229963, 25229964, 25229965, 25229966, 544298, 546346, C09K 1952, C09K 1912, C07D23902, C07D 1926

Patent

active

054220378

ABSTRACT:
The subject application discloses chiral nonracemic compositions of the general formula: ##STR1## wherein R.sub.1 is an achiral tail of two to sixteen carbons; Ar is an achiral FLC core of at least two rings; * denotes a chiral or potentially chiral carbon; Q and D are H or a methyl group, provided that q and D are not both methyl; X and Z are halides and Y is H or a halide; and R.sub.2 is one to ten carbon atoms. The --O--C*HQ--C*DX--C*HY-- segment comprises the chiral proximal segment of the chiral tail. Z can be an ortho halide alone, or ortho and meta halides on adjacent carbons on the aromatic ring of the core adjacent to the proximal segment. R.sub.2 is the distal segment of the chiral tail. The proximal segment is selected from the diastereomers and enantiomers: ##STR2##

REFERENCES:
patent: 4728458 (1988-03-01), Higuchi et al.
patent: 5130048 (1992-07-01), Wand et al.
patent: 5167855 (1992-12-01), Wand et al.
patent: 5180520 (1993-01-01), Wand et al.
Wand et al. "Properties of a Series of Phenylpyrimidine Ferroelectric Liquid Crystals Possessing the 2,3-difluoroalkoxy tail" (1991) Ferroelectrics 121:219-223.

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