New Materials, Compounds and Applications

A new series of compounds was synthesized, including [M(Anth)(Am-Nph)(H₂O)₂]Cl and [M(Anth)(Am-Nph)(H₂O)Cl], where M = Co²⁺, Ni²⁺, Cu²⁺, Zn²⁺ and Cd²⁺; Anth = anthranilic acid and Am-Nph = 1,8-diaminonaphthalene as a mixed ligand. The structures of the complexes were confirmed by FT-IR, ¹H- and ¹³C-NMR spectroscopy, CHN analysis, mass spectrometry, UV-vis, molar conductivity and magnetic moment. The spectral results indicate that the ligands exhibit bidentate behavior in all five complexes, which are mononuclear metal (II) complexes, with octahedral geometries observed in each metal complex. FTIR shows a lower frequency of the carboxylic and amino groups in the complexes than in the (Anth) ligand. X-ray powder diffraction of several chelates confirms multiple diffraction peaks, indicating the semicrystalline nature of the synthesized complexes. The complexes’ distinct particle sizes and distinct morphological characteristics were observed in the SEM images. Using density functional theory, various quantum chemical descriptors (QCDs) and frontier molecular orbitals (FMOs) were computed using 6-31G B3LYP as the basis set. Additionally, the synthesized compound's capacity to prevent the growth of pathogenic microbes, including Gram-negative bacteria (Escherichia coli) and fungi (Candida albicans), was assessed.