Synthesis of Triphenylene-Based Discotic Liquid Crystal Monomer Containing Azobenzene Moieties

摘要

The synthesis of a novel discotic liquid crystal monomer was carried out based on vinyl monomer whose molecular architecture consists of a triphenylene as central core and the peripheral cores were linked to the central core through an alkyl chain spacer. Consequently, a disk-like poymerizable monomer 2,3,6,7,10,11-hexakis-[11-(4-{4- (acryloxy)phenylazo}phenoxy)undecanoxy]triphenylene was prepared by using a ferric chloride oxidation method. Polarizing optical microscopy and DSC analysis shows that the monomer exhibited a wide columnar mesophase. UV-vis spectra of the azobenzene mesogens showed that a significant tailing, which would allow the use of laser in the visible range to photoinduce isomcrization and reorientation of the azo groups.