Synthesis and mesomorphic properties of 6-<i>n</i>-decyloxy-2-[4′-<i>N</i>-alkoxyphenylimino)methyl]quinolines (IV)

Abstract

Abstract The synthesis and mesomorphic properties of a new series of liquid crystals derived from quinoline with an imine central bond is described. All compounds exhibit mesophase ranges greater than 50°C. The lower homologues (n = 4–6) show trimorphism Sc-Sa-N (for n = 4, the Sc phase is monotropic). The higher homologues (n = 7–10) show nematic and smectic C phases. Compared to the styrylquinoline analogues the imine bond gives rise to similar liquid crystal phase ranges but lower melting points.