Chiral azobenzene dopants with increased delta helical twisting power

Abstract

A chiral azobenzene dopant with helical twisting power has a structure represented by the following formula (I): wherein Z and Z′ are independently selected from the group consisting of naphthalene and phenanthrene; when Z or Z′ is naphthalene, the naphthalene optionally has R3 at the 6 position and R4 at the 6′ position; when Z or Z′ is phenanthrene, the phenanthrene optionally has R3 at the 7 position and R4 at the 7′ position; R1, R2, R3, and R4 are independently selected from the group consisting of an alkyl group having 1 to 20 carbons, an alkoxy group having 1 to 20 carbons, an aryl group having 6 to 20 carbons, and an aryloxy group having 6 to 20 carbons; and on any R1, R2, R3, and R4, on any CH2 a CH3 is optionally attached by replacing a hydrogen on a CH2.

Dependencies are inferred from the claim text.