Synthesis and Characterization of New Azo Ligand and Its Co(II), Cu(II), Zn(II) and Ni(II) Complexes

This study describe the synthesis and characterization of new azoligand, 5-hydroxy-4-(2,4-dihydroxyphenylazo)-2,7-naphthatene disulfonic acid disodium salt (L): The Cu(II), Zn(II), Ni(II) and Co(II) complexes of the azo ligand were,prepared anticharacterized by infrared, UV-visible H-1 and C-13 NMR spectra, atomic absorption spectroscopy, mass spectrometry, elemental analyses, thermogravimetric analysis, conductivity and magnetic measurements. The results suggest that the complexes have a 1:1 (metal ligand) molar ratio, involving mononuclear azo ligand with:an ONO donor set Metal ion uptake studies were conducted with a batch technique The results indicate that the azo ligand has high thermal stability and good metal extraction capacity.