Synthesis and Properties of Optically Active Phenoxypropionates. Effect of Halogeno Substituent in the Core on Physical Properties

Abstract

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 (τ) 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.

Key Words:

• ferroelectric liquid crystal
• phenoxypropionate
• halogeno-substituent