Y. Goto et al., NEW NEMATICS WITH HIGH-BIREFRINGENCE, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 260, 1995, pp. 23-38
We prepared new compounds with the hexendiyne unit as central bridging
group. The substances are nematic, with clearing temperatures much hi
gher than those of other two ring compounds. They show the highest bir
efringence ever observed in liquid crystals, modest viscosities and me
dium dielectric anisotropy. Their stability in low polar mixtures allo
ws their use in displays.