Journal of alloys and compounds vol:303 pages:146-150
The synthesis and mesophase behaviour of lanthanide complexes with azomethine (Schiff base) ligands is described. The ligands are 4-tetradecyloxy-N-alkyl-2-hydroxybenzaldimines, where the alkyl chain on the imine nitrogen is C8H17, C12H25 or C18K37. The stoichiometry of the complexes formed by the reaction of the hydrated nitrates of the lanthanides with the azomethines is [Ln(LH)(3)(NO3)(3)]. All these coordination compounds exhibit liquid-crystalline properties. A viscous smectic A (SmA) mesophase is formed. The mesophase of these metallomesogens can be supercooled to a glassy state.