Synthesis and Liquid Crystal Properties of Chiral Compounds Containing the Core Structure of 6-Hydroxynicotinic Acid or 4-Hydroxyphenylacetic Acid

摘要

The carboxylic acid 4-hydroxybenzoic acid, bonded directly with (R)-2-octanol, is the core molecule of chiral liquid crystal (R)-MHPOBC. This acid was substituted either by 6-hydroxynicotinic or by 4-hy-droxyphenylacetic acid. Such a structural variation induced a remarkable influence on the liquid crystal properties of (R)-MHPOBC. The series of compounds 1～4 containing 6-hydroxynicotinic acid moiety tend to exhibit a chiral smectic C (SmC~*) phase, while the series of compounds 5～8 containing 4-hydroxy-phenylacetic acid moiety tend to possess a chiral nematic (N~*) phase.