| abstract |
The present invention relates to an isosorbide derivative having at least one polymerizable group, and further having at least one photoconvertible group for adjusting the helical twisting power of the isosorbide derivative. According to a preferred embodiment, the isosorbide has the chemical formula shown, in which A represents a bond or a p-phenylene group, and B and B ′ are independently O x —C o. 'a = CH 2, x is 0 or 1, o is 2~12, R' H 2o O- CO-CR is H or CH 3, P represents a CH 2 or C = O group, Q And Q ′ are independently selected from H, C1-C3 alkyl, C1-C3 alkoxy, halogen and CN, n is an integer from 1 to 3, and m is an integer from 0 to 2. |