EN
A new homologous series of liquid crystals based on n-alkoxybenzaldehyde, consisting of ten homologues, has been synthesized. This series exhibits a middle-order melting behavior, displaying both nematic and smectic mesophases. The transition curve between solid, isotropic, and mesomorphic states follows a zig-zag pattern, with alternating increases and decreases. The texture of the nematic phase is droplet-nematic texture, while the smectic phase shows a focal conic fan-shaped structure. The thermal stability and mesomorphic properties of this series are compared to those of structurally similar compounds. Analytical data confirm the molecular structure of the compounds, and transition temperatures are determined using an optical hot-stage polarizing microscope.