Preparation and Mesomorphic Characterization of Supramolecular Hydrogen-Bonded Dimer Liquid Crystals

Abstract

Two new series of hydrogen bonding liquid crystal dimers were prepared and their selfassemble behavior and structure-property relationships were studied through intermolecular hydrogen bond formation. The first series of symmetric liquid crystal dimers have two terminal alkoxy chains and the second have four terminal alkoxy chains. Their structures were elucidated using spectroscopic techniques, elemental analysis, and powdered X-ray diffraction. The mesophases and their corresponding transition temperatures were identified by differential scanning calorimetric measurements and polarized optical microscope.

Recent synthetic advances in pyridine-based thermotropic mesogens

“…Two series of supramolecular hydrogen bonded liquid crystal dimers were prepared by Al-Lami; 22 the mesogenic properties of the dimers were studied, as well as their structureproperty relationships. The synthetic routes for the preparation of the hydrogen bonded complexes are shown in Scheme 6.…”