| titleOfInvention |
Optically active polyester / amide, photoreactive chiral agent, liquid crystal composition, liquid crystal color filter, optical film and recording medium, method for changing the helical structure of liquid crystal, and method for fixing the helical structure of liquid crystal |
| abstract |
(57) [Summary] (With correction) [PROBLEMS] To provide an optically active polyester / amide (photoreactive type) having photosensitivity, capable of greatly changing the helical pitch (twisting force) of liquid crystal by light, and having good resolution. Chiral agent). An optically active polyester / amide comprising at least structural units represented by the following general formula (I) and the following general formula (II). [In General Formula (I), R 1 and R 8 each independently represents a hydrogen atom, an alkyl group, or an aryl group. R 2 to R 5 and R 9 to R 12 independently represents a hydrogen atom, a halogen atom, an alkyl group, or an alkoxy group, and R 1 and R 2 and R 8 and R 9 may be bonded to each other to form a 5-membered ring or a 6-membered ring. R 6 And R 7 and R 13 and R 14 each independently represents a hydrogen atom or an alkyl group. Ar 1 and Ar 2 are each independently 1,4- 1,4-phenylene or naphthalene-2,6-substituted with phenylene, naphthalene-2,6-diyl, one or more halogen atoms, alkyl groups, alkoxy groups Represents diyl or a single bond. A in the general formula (II) represents a divalent substituent. ] |