Laterally substituted naphthalene‐2,7‐diol‐based bent‐shaped liquid crystals

Novel series of laterally 1‐substitued (H, Cl, CH3, CN, NO2) naphthalene‐2,7‐diol based liquid crystals were synthesized and their mesomorphic properties identified using DSC studies, texture observation, X‐ray investigations and electro‐optical measurements. Depending on the chain length and type of lateral substitution, the compounds exhibit a variety of mesophases. In materials with short alkyl chains, the rectangular columnar B1 phase was found. Increasing the alkyl chain length for the non‐substituted core causes the appearance of the so‐called BN phase. In CH3‐ and Cl‐substituted compounds, the antiferroelectric B2 phase (SmCAPA) was found. Introduction of the CN and NO2 substituents led to the formation of the B7 phase.