New N-arylidene (S)-1-phenylethylamines as the components of induced short-pitch cholesterics

New N-arylidene (S)-1-phenylethylamines with ester group in arylidene fragm ent have been synthesized. The chiral dopants helical twisting power and te mperature dependence of the induced cholesteric helical pitch in LC systems based on 3-pentyl-4'-cyanobiphenyl have been studied as well as selective light reflection spectra and their temperature dependences for systems incl uding nematic E63 (Merck) and new chiral components. An influence of the ch iral dopant molecular structure on the mentioned characteristics of LC syst ems investigated was revealed. The induced cholesteric compositions with te mperature-independent selective light reflection in visible range have been obtained.