ARCHIVES
VOL. 10, ISSUE 3 (2026)
Synthesis, characterization, antibacterial and antioxidant activities of some new mixed-ligand metal complexes of a Schiff base ligand with organic acids
Authors
Md. Masuqul Haque, Savin Shayok Dipro, Titash Ray, Hafizur Rahman, Md. Kudrat-E-Zahan, Md. Nazrul Islam, Md. Yeamin Reza
Abstract
Mixed ligand complexes of Cu(II), Zn(II) and
Cd(II) have been prepared from isoniazid derived Schiff base and dicarboxylic
acids. The complexes were characterized by conductivity, magnetic
susceptibility, FT-IR and UV–vis spectroscopic studies. All complexes were
nonelectrolytes. The Cu(II) complexes have magnetic moments in the range
1.74-1.85 BM confirming their paramagnetic nature while the Zn(II) and Cd(II)
complexes were diamagnetic in nature as expected for their d¹⁰ configurations.
The FT-IR data indicated the coordination of the Schiff base through the
carbonyl oxygen and azomethine nitrogen atoms while the dicarboxylate ligands
coordinated through the oxygen atoms of the carboxylate groups. The Cu(II)
complex was suggested to be square-planar, while the Zn(II)/Cd(II) complexes
were proposed to be tetrahedral. The complexes showed moderate antibacterial
and DPPH radical scavenging activities. Among them, [Cd(L-1) (suc)] exhibited
the highest antibacterial activity with inhibition zones of 19-20 mm against
Pseudomonas sp. and Escherichia coli. The Cu(II) complexes exhibited better
antioxidant activity than the respective Zn(II) and Cd(II) complexes. The
results suggest the possible biological activity of the synthesized
mixed-ligand complexes.
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Pages:48-57
How to cite this article:
Md. Masuqul Haque, Savin Shayok Dipro, Titash Ray, Hafizur Rahman, Md. Kudrat-E-Zahan, Md. Nazrul Islam, Md. Yeamin Reza "Synthesis, characterization, antibacterial and antioxidant activities of some new mixed-ligand metal complexes of a Schiff base ligand with organic acids". International Journal of Chemistry Studies, Vol 10, Issue 3, 2026, Pages 48-57
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