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The authors explore the DNA binding properties of mixed ligand copper(II)/cobalt(II) complexes of the type [M(bnp)(phen)H2O]Â·nH2O, and copper(II)/cobalt(II) complexes of the type [M(Hbnp)2], where n = 0, 1,..., H2bnp = 3-hydroxy-N'-(2-hydroxybenzylidene)-2-naphthohydrazide and phen = 1,10-phenanthroline.  A host of phys. methods like spectral absorption, emission studies and hydrodynamic measurements were used to probe the effect of ligands on the mode and extent of interaction of the complexes with Calf Thymus DNA.  The efficiencies of the complexes to oxidatively cleaved pUC19 DNA was performed in the absence and presence of H2O2.  Among the compds. tested for antioxidant capacity, H2bnp displayed excellent activity than its complexes and stds. used.  Cu(II) and Co(II) complexes exhibited different levels of antibacterial and antifungal effects, with the assays carried out on four pathogenic bacteria and two pathogenic fungi.  H2bnp showed moderate activity against bacteria E. coli, X. vesicatoria and fungi, A. niger and A. flavus, but less than its complexes and std. drugs used for assay. [on SciFinder(R)

european journal of chemistry

Synthesis, characterization, antioxidant, antimicrobial, DNA binding and cleavage studies of mononuclear Cu(II) and Co(II) complexes of 3-hydroxy-N'-(2-hydroxybenzylidene)-2-naphthohydrazide