SOME NEW ALPHA-FLUORO ESTERS INCORPORATING A CYCLOHEXANE RING AS CHIRAL DOPANTS FOR FERROELECTRIC MIXTURES

A wide variety of new, optically active α-fluoro esters incorporating a trans-1,4-disubstituted cyclohexane ring and several different core structures have been prepared. Several of these new materials exhibit an enantiotropic chiral smectic C mesophase at elevated temperatures, characterized by high spontaneous polarization, long pitch and low rotational viscosity. Furthermore, they possess exceptional thermal, chemical and photochemical stability. Thus these novel α-fluoro esters incorporating a cyclohexane ring are excellent chiral dopants for chiral smectic C mixtures for utilization in the surface stabilized ferroelectric liquid crystal display. © 1990 Taylor and Francis Ltd.