“…For example, the R -binaphthyl derivative of the cisoid conformation (0° < θ < 90°) and that of transoid conformation (90° < θ < 180°) have ( M )- and ( P )-helicity, respectively, as described in Figure . The binaphthyl derivatives of ( M )- and ( P )-helicity induce N*-LCs with left-handed (counterclockwise) and right-handed (clockwise) screw senses (helical senses), respectively, despite having the same ( R ) configuration, when they are added as chiral dopants into N-LCs . For example, a nonbridged structure of the binaphthyl derivative exhibits a transoid conformation, and a bridged structure exhibits a cisoid conformation, in which the two oxygen atoms at the 2,2′-positions of the binaphthyl rings are linked with an alkyl spacer.…”