Room temperature difluoro-tolane and diphenyl-diacetylene liquid crystals with negative dielectric anisotropy

Abstract

Several laterally difluorinated tolane and diphenyl-diacetylene liquid crystals were synthesized and their physical properties evaluated. These compounds exhibit low melting temperature, small heat fusion enthalpy and large negative dielectric anisotropy. Their potential applications are in the high contrast displays using a homeotropic cell and for infrared spatial light modulators.