PB19 Novel liquid crystalline compounds possessing a strong dipole at its center

Abstract

We designed and synthesized a long bent-rod molecule 1-3 as a dopant to induce smectic C_A phases, and investigated the layer structures and properties by polarized light microscopy, differential scanning calorimetry, X-ray diffraction, and applying of an electric field. We found that a slight amount of 3a (ca. 0.5 mol%) can control the whole amount of molecules 4 in the liquid crystal phase to change the smectic C phase to a smectic C_A phase.