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• W2188846441 abstract "Condensation of Benzene-1,4-dicarbaldenhyde and 2,6 diaminopyridine in 1:2 molar ratio was carried out and this condensed ligand was further followed by condensation with 5-bromo-2-hydroxybenzaldehyde forming a new symmetrical Schiff base ligand, H 2L with two N 3O potentially active sites. Then a new series of homo-binuclear Cu(II), Ni(II), Co(II) and Mn(II) complexes have been synthesized. The binding manner of the ligand to the metal, composition and geometry of the metal complexes were examined by various physicochemical methods like elemental analysis, conductivity measurements, magnetic moments, IR, 1 H-NMR, CV, ESR and electronic spectral studies. It has been originated that the Schiff base ligand with Cu(II), Ni(II), Co(II) and Mn(II) ions form binuclear complexes with general formula (M2LY 2)Z2 where Y=2, 2ʹ bipyridyl and Z = acetate ion. The conductivity data confirm the electrolytic nature of the complexes. In all the complexes, the Schiff base, H 2L, ligand acts as dibasic with two N 3O tetradentate sites and coordinate with two metal ions to form binuclear complexes after the deprotonation of the hydrogen atoms of the phenolic groups in all the complexes via (C=N) of pyridyl nitrogen, (C-O) and the new azomethine (C=N) groups. UV-Vis spectra, ESR and magnetic moments have suggested octahedral stereochemistry for Cu(II), Ni(II), Co(II) and Mn(II) complexes. The cyclic voltammetric studies of these complexes in N,N-dimethylformamide indicate the structural changes during the course of redox reaction and quasi-reversible nature of the Schiff base binuclear complexes. The interaction of the complexes with calf thymus DNA (CT-DNA) has been investigated by UV absorption and viscosity methods, and the mode of CT-DNA binding to the complexes has been explored. The pUC18 DNA cleavage study was monitored by gel electrophoresis method. From this study, it was found that the homo-binuclear Schiff base metal complex cleaves pUC18 DNA in presence of the oxidant H2O 2.The Schiff base ligand and their binuclear metal complexes were also evaluated for their antibacterial activity and was found to be energetic and inhibits the bacterial growth of Bacillus subtilis, Staphylococcus aureus (as Gram-positive bacteria) and Klebsilla pneumonia and Escherichia coli (as Gram-negative bacteria)." @default.
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• W2188846441 date "2013-01-01" @default.
• W2188846441 modified "2023-09-22" @default.
• W2188846441 title "Structural Elucidation of Newly Synthesized Potentially Active Binuclear Schiff Base Cu(II), Ni(II), Co(II) and Mn(II) Complexes Using Physicochemical Methods" @default.
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