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

Chiral phenoxypropionates having halogenated 2,5-diphenylpyrimidine cores were synthesized and the effect of a halogeno-substituent on the physical properties such as mesomorphic behavior, spontaneous polarization (Ps) and response time (tau) were investigated. The introduction of 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 in the achiral host liquid crystal mixture were increased by introducing the halogen atom. However, response times were not improved.