Carboxylic acid ester compound, liquid crystal material,...

Details Carboxylic acid ester compound, liquid crystal material,... Carboxylic acid ester compound, liquid crystal material,...

C - Chemistry, Metallurgy

07

C

C07C 69/76 (2006.01) C07C 69/88 (2006.01) C07C 69/94 (2006.01) C07D 239/24 (2006.01) C07D 239/26 (2006.01) C07D 239/28 (2006.01) C07D 239/34 (2006.01) C09K 19/02 (2006.01) C09K 19/08 (2006.01) C09K 19/32 (2006.01) C09K 19/34 (2006.01) C09K 19/42 (2006.01) G02F 1/133 (2006.01)

Patent

CA 2093945

The carboxylic acid ester compound of the invention is represented by the following formula [I]: (see formula above) wherein R is an alkyl group of 3-20 carbon atoms; n is 0 or 1; at least one of A1, A2 and A3 is a group having tetralin structure, and the residual groups of A1, A2 and A3 axe each independently a group having specific aromatic cyclic structure such as a phenylene group and a biphenyl group; Y1 and Y2 are each independently a group selected from the group consisting of -COO-, -CH2CH2- and -CH2O-; Q1 is a group selected from the group consisting of -CH3, -CF3, -C2H5 and -C2F5; and q is an integer of 9 to 12. This carboxylic acid ester compound may be used as an antiferroelectric liquid crystal material, and also be used as a liquid crystal composition by using other liquid crystal material in combination. A liquid crystal element which is formed by filling the carboxylic acid ester compound in a gap between two substrates opposite to each other shows excellent properties required for antiferroelectric liquid crystal elements, for example, high speed switching.

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