| abstract |
A ferroelectric liquid crystal comprises (i) one or more chiral compounds of the formula:n (in which R¹ and R² are each a straight or branched alkyl, alkoxy, alkoxyalkoxy, alkoxycarbonyl, alkanoyl or alkanoyloxy group containing up to 18 carbon atoms and at least one of R¹ and R² has an asymmetric carbon atom in the alkyl chain moiety thereof); and (ii) one or more chiral compounds having a spontaneous polarization value of 40 nC/cm² or more. |