Abstract
Diazo-coupling reaction of 2-aminopyrimidine with 2-naphthol resulted in a novel heterocyclic azo derivative and this ligand formed a series of metal complexes with Mn(II), Co(II), Ni(II), Cu(II) and Zn(II) salts under well-defined conditions. The structural characterization of the ligand and its metal complexes was carried out on the basis of elemental analyses, molar conductance, magnetic susceptibility measurements, UV-Vis., IR, NMR and FAB mass spectral data. Analytical data revealed that all the complexes exhibited 1:2 metal-ligand ratio. Spectral studies showed that the ligand existed in the azo-enol form and coordinated to the metal ion in a bidentate fashion through the deprotonated naphtholate oxygen and one of the azo nitrogen atoms. Electronic spectral data and magnetic susceptibility measurements were used to establish the geometry of the complexes. XRD study revealed that both the ligand and its complex possessed an orthorhombic crystal lattice. The ligand and its complexes were applied to silk fabric and their fastness properties were evaluated. DNA cleavage activity of the ligand and its complexes were monitored by agarose gel electrophoresis method.