US4737313A
Expired / Lapsed
US
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Liquid-crystalline substituted biphenyl esters
Assignee: JNC Corp
•
Filing: 1986-08-08
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Granted: 1988-04-12
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Expires: 2006-08-08
Abstract
Abstract Novel ferroelectric liquid crystals exhibiting a chiral smectic C phase and liquid crystal compositions containing the same are provided, which liquid crystals are substituted biphenyl esters expressed by the general formula ##STR1## wherein R 1 * represents an optically active alkyl group of 4 to 18 carbon atoms; ##STR2## represents ##STR3## or ##STR4## Z represents R 2 , R 2 CO or R 2 COO wherein R 2 represents an alkyl group or an alkoxy group each of 1 to 18 carbon atoms; and X and Y each represent hydrogen atom (H), bromine atom (Br), chlorine atom (Cl), fluorine atom (F) or cyano group (CN), and either one of X or Y is always hydrogen atom.
Inventors
- 👤 Shinichi Saito
- 👤 Hiromichi Inoue
- 👤 Kanetsugu Terashima
- 👤 Takashi Inukai
- 👤 Kenji Furukawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:43
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3066; C09K19/3068; C09K19/10; C09K19/20; C09K19/2007; C09K19/2021
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
108 words
A substituted biphenyl ester expressed by the general formula ##STR57## wherein R 1 * represents an optically active alkyl group of 4 to 18 carbon atoms; ##STR58## represents ##STR59## or ##STR60## Z represents R 2 , R 2 CO or R 2 COO wherein R 2 represents an alkyl group or an alkoxy group each of 4 to 12 carbon atoms; and X and Y each represent hydrogen, bromine, chlorine, fluorine or cyano, and either one of X or Y is always hydrogen, with the provisos that (1) X and Y are not both hydrogen, and (2) when ##STR61## Z is alkyl of 4 to 12 carbon atoms.
Claim 2
Dependent Claim
108 words
A substituted biphenyl ester expressed by the general formula ##STR57## wherein R 1 * represents an optically active alkyl group of 4 to 18 carbon atoms; ##STR58## represents ##STR59## or ##STR60## Z represents R 2 , R 2 CO or R 2 COO wherein R 2 represents an alkyl group or an alkoxy group each of 4 to 12 carbon atoms; and X and Y each represent hydrogen, bromine, chlorine, fluorine or cyano, and either one of X or Y is always hydrogen, with the provisos that (1) X and Y are not both hydrogen, and (2) when ##STR61## Z is alkyl of 4 to 12 carbon atoms.
Claim 3
Dependent Claim
19 words
A compound according to claim 1 wherein R 1 * in the general formula (I) represents the 2-methylbutyl group.
Claim 4
Dependent Claim
19 words
A compound accoridng to claim 1 wherein X represents Br and Y represents H in the general formula (I).
Claim 5
Dependent Claim
19 words
A compound according to claim 1 wherein X represents CN and Y represents H in the general formula (I).
Claim 6
Dependent Claim
19 words
A compound according to claim 1 wherein X represents H and Y represents Br in the general formula (I).
Claim 7
Dependent Claim
25 words
A chiral smectic liquid crystal composition comprising a mixture of compounds at least one of which is a compound as set forth in claim 1.
Claim 8
Dependent Claim
18 words
A chiral smectic liquid crystal composition consisting of a plurality of compounds as set forth in claim 1.
Claim 9
Dependent Claim
28 words
In a light-switching element containing a chiral smectic liquid crystal composition, the improvement wherein the composition is chiral smectic liquid crystal composition as set forth in claim 6.
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