Triphenylene Discotic Liquid Crystals Synthesis And Characterization

Discotic LCD is a new potential photoelectric material, Synthesis and properties of foreign studies in this area have a certain theoretical basis and our report on the research in this area is rare. Having summed up in two series of HET and HAT with LCD liquid crystal on the basis of triphenylene discotic liquid crystals, A new disc designed compound has been synthesized successfully. The principal elements are as follows :1. veratrol -as raw material, from molar ratio, temperature, reaction time, solvent, desiccant P₂O₅ five single-factor method of adding three oxidative polymerization inspected the best technology, increase the yield from 60% to above 80%.2. On the basis of the aforesaid conditions, HET and HAT have been synthesized compounds .The purity of the compounds was been analyzed by gas chromatography and HPLC analysis .Infrared spectroscopy (IR). NMR (¹H) and other analytical tools were used to identify these compounds. Differential scanning calorimetry (DSC) of this series of compounds for the phase transition temperature, we discussed the length of the side chain to the impact of phase-change interval, and found that with the end of the group's LCD growth will lead to the melting point. - shiny drop of liquid crystal temperature range terminated with the changes showed a downward turn regularity.3. Disk design of a new compound named triphenylene-2,3,6,7,10,11-hexayl hexakis(3,4-bis(hexyloxy)benzoate) has been synthesized successfully. Infrared spectroscopy (IR). NMR (¹H) and other analytical tools have been used for the identification of compounds. Differential scanning calorimetry (DSC), polarized light microscopy (POM) were used to determine the phase transition temperature and columnar phase.