SYNTHESIS AND PROPERTIES OF OPTICALLY-ACTIVE PHENOXYPROPIONATES - EFFECT OF HALOGENO SUBSTITUENT IN THE CORE ON PHYSICAL-PROPERTIES

Chiral phenoxypropionates having halogenated 2,5-diphenylpyrimidine co res were synthesized and the effect of a halogeno-substituent on the p hysical properties such as mesomorphic behavior, spontaneous polarizat ion (Ps) and response time (tau) were investigated. The introduction o f a halogen atom to the phenyl ring of 2,5-diphenylpyrimidine core led to a decrease in the thermal stability of mesophases. The Ps values i n the achiral host liquid crystal mixture were increased by introducin g the halogen atom. However, response times were not improved.