Design of an extremely high birefringence nematic liquid crystal based on a dinaphthyl-diacetylene mesogen

We designed dinaphthyl-diacetylene-based nematic liquid crystals with alkoxy tails (DNDA-OCm) and evaluated their birefringence (Delta n). Actual measurements of pure target compounds showed that DNDA-OC2 had the highest value of 0.62 at 550 nm at T-c + 10 degrees C.