6,6'位にハロゲン基を有するビナフチル型キラル剤の合成とねじれ誘起力

抄録

Binaphthyl type chiral dopants bridged by alkane chain at 2,2'-position are known to possess a large helical twisting power (HTP). We previously reported that the 6,6'-fluoronated binaphthyl type chiral dopant exhibited a large HTP and high solubility in a fluorinated nematic liquid crystal. In this study, we synthesized the 6,6'-halogenated binaphthyl type chiral dopants and investigated influence of the molecular properties such as size of halogen groups or polarity and polarizability of chiral dopants on their HTPs. The 6,6'-chlorinated chiral dopant showed the highest |HTP| among synthesized chiral dopants. On the other hand, |HTP| of chiral dopants decreased with the increasing the size of halogen groups.