Ferroelectric Liquid Crystals: Synthesis and Thermal Behavior of Optically Active, Three-Ring Schiff Bases and Salicylaldimines
作者:Bhyranalyar N. Veerabhadraswamy、Doddamane S. Shankar Rao、Channabasaveshwar V. Yelamaggad
DOI:10.1002/asia.201800119
日期:2018.4.16
center in the other isomer as they are derived from (3 S)‐3,7‐dimethyloctyloxy and (3 R)‐3,7‐dimethyloctyloxy tails. To probe the structure–property correlations in each series, the length of the n‐alkoxy tail situated at the other end of the mesogens has been varied from n‐octyloxy to n‐dodecyloxy. The measurement of opticalactivity of these chiral mesogens was carried out by recording their specific
Chiral salicylaldimine-based liquid crystals in which the (S)-2-octyloxyl tail close to or far from the salicylaldimine core possesses a frustrated blue phase and an antiferroelectric SmC*A phase.
The homologous series of N-[4-(4-n-alkoxybenzoyloxy)benzylidene]-4-(2-methylbutoxy)aniline (1), and N-[4-[4-(2-methylbutoxy)benzoyloxy]benzylidene]-4-n-alkoxyaniline (2), and N-[4-(4-n-alkoxybenzoyloxy)-3-hydroxybenzylidene]-4-(2-methylbutoxy)aniline (3) where the 2-methylbutoxyl group has an S-configuration, have been prepared. Series 1 and 2 form a chiral smectic C (SC*) phase in addition to a cholesteric