Synthesis and Mesomorphism of a Novel Triphenylene-Based Discotic Liquid Crystal with Unsaturated Side Chain

摘要

A novel triphenylene-based discotic liquid crystal 2-allylcarboxyl-3,6,7,10,11-pentapentyloxytriphenylene was synthesized. The chemical structure was determined by 'H-NMR and FT-IR spectrum, and its mesomorphism was investigated by differential scanning calorimeter (DSC) and polarizing optical microscopy (POM) method. The compound showed classical texture of columnar phase in a wide mesophase temperature from the room temperature to 175 °C during cooling. It also sets the foundation of designing and preparing liquid crystal polymer due to its double bond of the side chain.