PB18 Synthesis and Characterization of Discotic Liquid-Crystalline Compounds Having Trialkylsilyl Groups

Abstract

Novel discotic liquid-crystalline materials were synthesized from triphenylene and hexabenzocoronene by attaching trialkylsilyl groups in the side chains. These compounds dissolved well in hexane, toluene, chloroform, diethyl ether and THF. DSC, POM and XRD measurements proved that triphenylene and hexabenzocoronene derivatives exhibit Col r and Col ho masophases respectively, over wide temperature ranges. Trialkylsilyl group was shown to be an effective flexible moiety of liquid-crystalline materials to improve solubility in organic solvents.