Organometallic Ferroelectric Liquid Crystals. III. Syntheses and Liquid Crystal Properties of ortho-Palladated Binuclear Complexes of Azine, Imine and Azo Derivatives

Abstract

Abstract In this paper, we report the syntheses of a series of title complexes from the reaction of azine, imine or azo ligands with Pd(OAc)2 and with different bridging groups. Moreover we have investigated the mesomorphic properties of these complexes using DSC and polarizing microscopy. The results show that the mesophase temperature ranges of complexes are wider than that of corresponding organic ligands. The role of the central organic ligands, the bridging ligands between two metallic nuclei, and terminal carbon number on the mesomorphic behavior was also determined. When the bridging ligands contain an optically active group, the complexes appear to exhibit chiral smectic C phase (S* c ). Key Words: FLCorganometallicsynthesis