Cholesteric helix inversion: investigations on the influence of the terminal group on the inversion of the helical pitch in trioxadecalins

Abstract

Synthesis and mesogenic properties of new liquid crystals, bearing a chiral trioxadecalin system, are described. As cholesteric helix inversions in trioxadecalin systems bearing a terminal cyano or nitro group have previously been observed, the terminal group has been changed systematically to elucidate its influence on the occurrence of inversions of the helical pitch.