Abstract
Ionic interactions act effectively as a driving force for the liquid crystal formation. In many cases, the ionic interactions lead to the formation of layer structures with enhanced thermal stability. The ionic interactions are also useful to the complexation of polyamine and carboxylate groups. In this study, thermotoropic liquid crystalline ion complexes were synthesized by the proton-transfer reaction of a malonate derivative with a mesogenic unit and an amine group (polyamine or diethanolamine). Their phase trasitions and orientational properties were examined. The liquid crystalline ion complexes, having a diethanolamine group, exhibited hexagonal columnar and smectic A phases. On the other hand, the polyamine containing liquid crystalline ion complexes formed a smectic A phase. The orientational structures were examined by the X-ray diffraction measurement.
