Synthesis and Spectral, Thermal and Antimicrobial Investigation of Mixed Ligand Metal Complexes of N-Salicylidene Aniline and 1,10-Phenanthroline

Coordination compounds of Co(II), Cu(II), Y(III), Zr(IV) and La(III) ions were synthesized from the N-salicylidene aniline (L) derived condensation with salicylaldhyde 1,10-phenanthroline (phen) as a secondary mixed ligand. L, phen their complexes characterized using various physiochemical methods, such elemental analyses (CHN), Fourier-transform infrared spectroscopy (FT-IR), molar conductance (Λ), magnetic susceptibility (μeff), proton nuclear resonance (1H NMR), ultraviolet–visible (UV–Vis) thermogravimetric analysis (TG/DTG). The analytical spectroscopic data supporting chemical formulas metal chelation L forming octahedral complexes. FT-IR spectra demonstrated that chelated bidentate ligand via oxygen atom phenolic group band in range 3378–3437 cm−1 nitrogen azomethine at 1612 cm−1. In addition, through two atoms 1525–1565 1H NMR results confirmed IR assumption connected to phenolic’s atom. measurements revealed high values electrolytic nature these 90.40–125.80 S cm2 mol−1. Thermal (TG/DTG) was used differentiate between coordinated hydrated water molecules thermal stability Finally, anti-microbial activities investigated against fungi (Candida albicans), Gram-negative bacteria (Escherichia coli Salmonella typhimurium) Gram-positive (Staphylococcus aureus Micrococcus sp.) disc diffusion method. complex significant C. albicans compared all other reference standard control.