| abstract |
The invention pertains to an isosorbide derivative having at least one polymerizable group, characterized in that the isosorbide derivative further comprises at least one photo-convertible group for adjusting the helical twisting power of the isosorbide derivative. According to a preferred embodiment the isosorbide has the formula n n n wherein n A stands for a bond or a p-phenylene group; n B and B′ are independently O—(CH 2 ) o O—CO—CR′═CH 2 , o being 2-12 and R′ being H or CH 3 ; n P stands for a CH 2 or a C═O group; n Q and Q′ are independently selected from H, C1-C3 alkyl, C1-C3 alkoxy, halogen, and CN; n n is an integer from 1 to 3; and n m is an integer from 0 to 2. |