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Cu(I) complexes of bis(methyl)(thia/selena) salen ligands: Synthesis, characterization, redox behavior and DNA binding studies. | LitMetric
Mononuclear cuprous complexes 1 and 2, [{CHE(o-CH)CH=NCH}Cu]ClO; E=S/Se, have been synthesized by the reaction of bis(methyl)(thia/selena) salen ligands and [Cu(CHCN)]ClO. Both the products were characterized by elemental analysis, ESI-MS, FT-IR, H/C/Se NMR, and cyclic voltammetry. The complexes possess tetrahedral geometry around metal center with the NS/NSe coordination core. Cyclic voltammograms of complexes 1 and 2 displayed reversible anodic waves at E=+0.08V and +0.10V, respectively, corresponding to the Cu(I)/Cu(II) redox couple. DNA binding studies of both the complexes were performed applying absorbance, fluorescence and molecular docking techniques. Competitive binding experiment of complexes with ct-DNA against ethidium bromide is performed to predict the mode of binding. The results indicate the groove binding mode of complexes 1 and 2 to DNA. The binding constants revealed the strong binding affinity of complexes towards ct-DNA.
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