摘要:
A mesomorphic compound represented by the following formula (I): ##STR1## wherein R.sub.1 denotes a linear or branched alkyl group having 2-16 carbon atoms capable of including one or two non-neighboring methylene groups which can be replaced with ##STR2## and capable of including fluorine substituted for hydrogen; A denotes --A.sub.1 -- or --A.sub.1 --A.sub.2 -- and B denotes --B.sub.1 -- or --B.sub.1 --B.sub.2 -- wherein A.sub.1, A.sub.2, B.sub.1 and B.sub.2 respectively denote ##STR3## wherein Y.sub.1 and Y.sub.2 respectively denote H, F, Cl, Br, --CH.sub.3, --CN or --CF.sub.3 ; Z.sub.1 and Z.sub.2 respectively denote ##STR4## Z.sub.3 denotes ##STR5## R.sub.2, R.sub.3 and R.sub.4 respectively denote a linear or branched alkyl group having 1-16 carbon atoms including a methylene group which can be replaced with ##STR6## with proviso that it is not adjacent to the silicon atom; p and q are respectively 0 or 1 with proviso that p+q is 0 or 1; and n is an integer of 1-12. The mesomorphic compound is effective for providing a ferroelectric liquid crystal composition showing an improved low-temperature operation characteristic and a decreased temperature-dependence of response speed.
摘要:
A mesomorphic compound represented by the following formula (I): ##STR1## wherein R.sup.1 and R.sup.2 respectively denote a linear or branched alkyl group having 1-18 carbon atoms capable of including one or two or more non-neighboring methylene groups which can be replaced with at least one species of --Z--, ##STR2## --CH.dbd.CH-- and --C.tbd.C--, wherein Z denotes --O-- or --S-- and R.sup.3 denotes hydrogen or an alkyl group having 1-5 carbon atoms; A.sup.1 denotes ##STR3## and A.sup.2 denotes any one of ##STR4## The mesomorphic compound is effective for providing a ferroelectric liquid crystal composition showing an improved low-temperature operation characteristic and a decreased temperature-dependence of response speed.
摘要:
A liquid crystal composition, comprising: at least one compound represented by the following formula (I): ##STR1## wherein R.sub.1 and R.sub.2 respectively denote an optically inactive linear or branched alkyl group having 1-18 carbon atoms capable of including one or non-neighboring two or more methylene groups which can be replaced with at least one species of ##STR2## wherein Z denotes --O-- or --S-- and R.sub.3 denotes hydrogen or an alkyl group having 1-5 carbon atoms; A denotes --A.sub.1 -- or --A.sub.2 --A.sub.3 -- wherein A.sub.1 denotes ##STR3## and A.sub.2 and A.sub.3 respectively denote ##STR4## or --A.sub.1 --; and at least one compound represented by the following formula (II): ##STR5## wherein R.sub.4 denotes a linear or branched alkyl group having 1-18 carbon atoms capable of having a substituent; X.sub.1 denotes a single bond, --O--, ##STR6## X.sub.2 denotes a single bond, --O-- or ##STR7## Z.sub.1 denotes a single bond or ##STR8## A.sub.4 denotes ##STR9## and l is 1-12.
摘要:
An optically inactive mesomorphic compound of the formula (I) according to claim 1 characterized by having a terminal group of: --A.sub.3 --C.sub.r F.sub.2r+1, where A.sub.3 is a specific cyclic group and r is 2-18, is suitable as a component for a liquid crystal composition providing improved response characteristics and a high contrast. A liquid crystal device is constituted by disposing the liquid crystal composition between a pair of electrode plates. The liquid crystal device is used as a display panel constituting a display apparatus (or display method) providing good display characteristics.
摘要:
A mesomorphic compound represented by the following formula (I):R.sub.1 --A.sub.1 --B.sub.1 --A.sub.2 --R.sub.2 (I),wherein R.sub.1 and R.sub.2 respectively denote a linear or branched alkyl group having 3-18 carbon atoms capable of including one or non-neighboring two or more methylene groups which can be replaced with at least one species of --Z--, ##STR1## CH.dbd.CH-- and --C.tbd.C--, wherein Z denotes --O-- or --S-- and R.sub.3 denotes hydrogen or an alkyl group having 1-5 carbon atoms; B.sub.1 denotes ##STR2## A.sub.1 denotes a single bond, ##STR3## A.sub.2 denotes a single bond, --A.sub.3 -- or --A.sub.3 --A.sub.4 -- wherein A.sub.3 and A.sub.4 respectively denote any one of ##STR4## and Y.sub.1 and Y.sub.2 respectively denote any one of hydrogen, fluorine, chlorine, bromine, --CH.sub.3, --CN and --CF.sub.3.
摘要:
1. A mesomorphic compound represented by the following formula 8 I]: ##STR1## wherein R.sub.1 and R.sub.2 respectively denote a straight chain or branch chain allyl group having 1-18 carbon atoms, wherein --CH.sub.2 -- in the alkyl group may be substituted by ##STR2## on condition that hetero atoms are not adjacent each other, R.sup.2 may be hydrogen atom, halogen atom, cyano group and trifluoromethyl group; n is 0 or 1, with the proviso that A.sup.1 denotes a single bond, ##STR3## when n is 0, A.sup.1 denotes a single bond when n is 1; A.sup.2 denotes any one of ##STR4## and X.sup.1, X.sup.2, Z.sup.1 and Z.sup.2 denote independently any one of hydrogen atom, halogen atom, cyano group and trifluoromethyl group, with proviso that X.sup.1, X.sup.2, Z.sup.1 and Z.sup.2 may not be all hydrogen atoms; Y denotes any one of ##STR5## a single bond.
摘要:
A mesomorphic compound represented by the following formula (I): ##STR1## wherein R.sub.1 and R.sub.2 respectively denote an alkyl group having 1-16 carbon atoms optionally substituted; X.sub.1 and X.sub.3 respectively denote a single bond, --O--, ##STR2## X.sub.2 denotes a single bond, ##STR3## A.sub.1 denotes a single bond ##STR4## A.sub.3 denotes ##STR5## A.sub.2 denotes 9, 10-dihydro-2,7-phenanthrenediyl, 2,7-fluorenediyl or 2,7-fluorenonediyl; n is 0 or 1; and X.sub.4 and X.sub.5 respectively denote hydrogen, F, Cl, Br, --CH.sub.3, --CN or --CF.sub.3, with proviso that X.sub.1 is a single bond when A.sub.1 is a single bond.
摘要:
A mesomorphic compound represented by the following formula (I): ##STR1## wherein R.sub.1 and R.sub.2 respectively denote a linear or branched alkyl group having 1-18 carbon atoms capable of including one or non-neighboring two or more methylene groups which can be replaced with at least one species of --O--, --S--, --CO--, --COO--, --OCO-- and --OCOO--; ##STR2## and n is 0 or 1.
摘要翻译:由下式(I)表示的介晶化合物:其中R 1和R 2分别表示具有1-18个碳原子的直链或支链烷基,可以包括一个或不相邻的两个或更多个亚甲基, 可以被至少一种-O - , - S - , - CO - , - COO-,-OCO-和-OCOO-代替; ,n为0或1。
摘要:
A mesomorphic compound of the formula (I) having a coumaran skeleton is suitable as a component for a liquid crystal composition providing improved response characteristics. A liquid crystal device is constituted by disposing the liquid crystal composition between a pair of electrode plates. The liquid crystal device is used as a display panel constituting a display apparatus providing good display characteristics.
摘要:
A mesomorphic compound represented by: ##STR1## where R.sub.1 and R.sub.2 are alkyl; X.sub.1 and X.sub.3 are a single bond, ##STR2## X.sub.2 is a single bond, ##STR3## A.sub.1, A.sub.2 and A.sub.3 are a single bond, aryl, heteroaryl, pyrimidyl or cyclohexyl, X.sub.4a, X.sub.5a, X.sub.4b, X.sub.5b, X.sub.4c and X.sub.5c are H, F, Cl, Br, --CH.sub.3, --CN or --CF.sub.3 ; and n is 0 or 1.