Synthesis, characterization, theoretical and molecular docking studies of mixed-ligand complexes of Cu (II), Ni (II), Co (II), Mn (II), Cr (III), UO2 (II) and Cd (II)
A novel bis-bidentate azo dye ligand, formed by the diazotized reaction of 1,4-diaminobenzene and 8-hydroxyquinoline in 1:2 M ratio resulted the formation of 5,5'-{(1E, 1E′)-1,4-phenylenebis(diazene-2,1-diyl)}bis(quinolin-8-ol) (H2L1) as primary ligand and its Cu(II), Ni(II), Co(II), Mn(II), Cr(III), UO2(II) and Cd(II) complexes. Incorporating of 8-hydroxyquinoline (HL2) as co-ligand with the formed mixed-ligand complexes were synthesized and characterized using elemental analysis, FT IR, 1 H NMR, UV–visible and mass spectroscopy as well as molar conductance, magnetic measurements, solid reflectance, thermal analysis, electron spin resonance and X-ray diffraction. From elemental and spectral data, the formulae [M2(L1)(L2)2(OH2)4] (where M = Cu(II) (1), Co(II) (2), Ni(II) (3), Mn(II) (4), UO2(II) (6), Cd(II) (7)) and [Cr2(L1)(L2)2(H2O)2(Cl)2] (5) for the metal complexes have been proposed. The geometri