Indian Journal of Advances in Chemical Science, Volume: 10, Issue : 2, April 2022

ISSN No.: 2320-0898 (Print); 2320-0928 (Electronic)

DOI: 10.22607/IJACS.2022.1002002

Research Article

Synthesis, Physico-chemical, Spectral, and Antibacterial Activity Studies of
Ni(II), Mn(II), and Cu(II) Complexes of Schiff Base Ligand Containing Triazole
moiety

Nayaz Ahmed*, Mohd Riaz, Suman Malik, Archana Singh

ABSTRACT

A new series of Ni(II), Mn(II), and Cu(II) complexes of tridentate Schiff base derived from condensation of 3-Amino-1,2,4-triazole (3-Amino-s-Triazole) with salicylaldehyde (2-Hydroxybenzaldehyde) were synthesized in a 2:1 molar ratio. Physical (Magnetic measurements, molar conductance, and TG), spectral (IR, UV-Vis, and Mass) and analytical data have established the structures of synthesized Schiff base and its metal complexes. The elemental analysis data suggest the stoichiometry to be 2:1 (L: M). All the complexes are non-electrolytic in nature as suggested by molar conductance measurement. Infra-red spectral data indicate the coordination between the ligand and the central metal ion through deprotonated phenolic oxygen, triazole nitrogen, and azomethine nitrogen atoms. Spectral studies and magnetic susceptibility measurements suggest an octahedral geometry for the complexes. The ligand and its complexes were tested/screened for their antibacterial activity against two Gram-positive bacteria species Staphylococcus aureus and Lactobacillus and two Gram-negative species Escherichia coli and Pseudomonas aeruginosa. It is observed that the ligand as well as the complexes showed good activity against all microbes.

Key words: 3-Amino-1,2,4-triazole, Antibacterial activity, Complexes, Schiff base, Spectral studies.

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