Synthesis and mesomorphic characterization of Cu(II), Ni(II) and Pd(II) complexes with azomethine and chalcone as bridging group

Abstract

The synthesis and mesomorphic properties of a homologous series of 4-(4'-n-alkoxy propionyl) imine-2"-hydroxy bnzealdehyde (where n = 8, 10, 12, 14, 16, 18 n-alkyl) and their Cu(II), Ni(II) and Pd(II) complexes are reported here. All the compounds have been characterized by physical methods such as complexometric titration, elemental analysis, IR, ¹H NMR, UV/Visible, ESR (RT and LNT) and TGA studies. Liquid crystalline properties of the ligands and complexes have been studied by DSC analysis and polarized optical microscopy.