Tuning the mesomorphic properties of liquid-crystalline dibenzotetraaza[14]annulenes - discotic nematic phases of tetraalkoxy-substituted derivatives

A homologous series of five tetrasubstituted dibenzotetraaza[14]annulene-based discotic mesogens was prepared and studied using polarizing optical microscopy (POM) and differential scanning calorimetry (DSC). A nematic phase was identified for the product bearing two peripheral isobutoxy and two dodecyloxy substituents.