| abstract |
A method for increasing HTP in an optically active compound used for a liquid crystal material is provided. Further, the present invention provides an optically active compound showing a large HTP value. Further, the present invention provides a liquid crystal composition having a high liquid crystal maximum temperature after addition of an optically active compound, and a liquid crystal display device using the same. In a compound having a partial structure represented by the formula (A) having an asymmetric carbon atom, the partial structure represented by the formula (A) is replaced by a compound represented by the formula (B) (Wherein * represents the position of an asymmetric carbon atom, and Y 1 represents a substituent such as an alkyl group or halogen). A method of increasing the helical twisting power by substituting a partial structure represented by Formula (I) (Wherein, R 1 and R 2 are alkyl groups, alkenyl groups, etc., A 1 , A 2 , A 3 are 1,4-phenylene groups, 1,4-cyclohexylene groups, etc., Z 1 , Z 2 , E 1 , E 2 represents a single bond, -COO- -CH 2 CH 2 - and the like, m, n, p, q represents 0, 1, 2). A compound represented by the formula: [Selection diagram] None |