Series of 15 new liquid crystalline compounds have been synthesized and studied composed of non-symmetrical bent-shaped molecules based on a 7-hydroxynaphtalene-2-carboxylic acid, the central naphtalene core being laterally substituted by chlorine or the methyl group. Studies of textures in planar samples, calorimetric study, X-ray diffraction and dielectric measurements enabled to establish mesomorphic properties (ie. phase transitions and sequences of phases) of these compounds. The studied compounds exhibit the antiferroelectric B2 phase and relatively scarce polar columnar phases. With compounds substituted by chlorine the nematic phase has been found. The occurence of the nematic phase together with the columnar one is quite unique. The work contributed to understand relationship between the molecular structure of compounds and their mesomorphic properties (see
M. Kohout a kol., J. Mater. Chem. 19, 3153 (2009)).
