| Abstract: |
This study reports the synthesis, structural characterization, and functional evaluation of a series of novel inorganic metal complexes derived from a tridentate Schiff base ligand coordinated with Co(II), Ni(II), Cu(II), and Zn(II) ions. The complexes were synthesized through a controlled reflux method and characterized using elemental analysis, molar conductance measurements, FTIR, UV-Visible spectroscopy, magnetic susceptibility, and thermo gravimetric analysis (TGA). Elemental analysis data confirmed a 1:2 metal-to-ligand stoichiometry across all four complexes, while molar conductance values indicated non-electrolytic behaviour in DMF solvent, supporting octahedral coordination geometry around the central metal ions. FTIR spectral shifts in the azomethine (C=N) stretching frequency, along with the appearance of new M-N and M-O bands, confirmed ligand coordination through nitrogen and oxygen donor atoms. UV-Visible spectral analysis and magnetic moment values were consistent with octahedral geometries for the Co(II) and Ni(II) complexes, whereas the Cu(II) complex displayed a distorted octahedral arrangement due to Jahn-Teller distortion. Thermal analysis revealed a three-stage decomposition pattern, with the Cu(II) complex demonstrating superior thermal stability up to 310°C compared to the other synthesized complexes. The data collected across five analytical parameters were statistically correlated to establish structure-property relationships relevant to catalytic and antimicrobial applications. |
