OPTICALLY ACTIVE POLYESTER, PHOTOREACTIVE CHIRAL AGENT, LIQUID CRYSTAL COMPOSITION, LIQUID CRYSTAL COLOR FILTER, OPTICAL FILM, RECORDING MEDIUM, METHOD OF CHANGING THE HELICAL STRUCTURE OF A LIQUID CRYSTAL, AND METHOD OF FIXING THE HELICAL STRUCTURE OF A LIQUID CRYSTAL

摘要

The present invention discloses an optically active polyester comprising at least constituent units represented by the general formula (I) and the general formula (II): ;wherein Ar¹ and Ar² each independently represents a bivalent aromatic group or a bivalent heteroaromatic group, and X¹ and X² each independently represents a hydrogen atom or an electron-withdrawing group, ;wherein A represents a bivalent substituent.