Chelate polymer compounds with bis(bidentate) ligand: synthesis, spectral, morphological and thermal degradation studies

Abstract

Four divalent transition chelate polymer compounds (1–4) were synthesised by condensation of ibpmpc (isophthaoyl bis(paramethoxyphenylcarbamide)) with metal acetate in a dimethylformamide medium. The synthesised polymer compounds 1–4 were characterised by elemental analyses, FT-IR, diffuse reflectance, magnetic moment measurements and thermal studies. Each metal ion is coordinated through an oxygen atom of the carboxylate group and a nitrogen atom of the amide group of ligand and two aqua ligands by the coordinated bond which formed a six-member het-erocyclic ring and significantly formed octahedral geometry for 1–3, whereas distorted octahedral geometry for 4. The thermal properties were studied by TG/DTG/DTA analyses. It was found that the thermal stabilities of polymer compounds follow the order: 4 > 3 > 1 > 2. Also, their physical properties including solubility, colour and melting point were studied, and the result showed insolubility in common organic solvents. Moreover, SEM and XRD studies were carried out to determine the size and morphological behaviour of chelate polymer compounds. The electrical conductivity of 1–4 compounds were measured in compressed pellet form at 311 K which showed poor semiconducting nature.