Synthesis, characterization of mixed- ligand complexes containing 2,2-Bipyridine and 3-aminopropyltriethoxysilane

A mixed-ligand metal complexes with divalent ion Co, Ni and Cu containing 3-aminopropyltriethoxysilane(3-APTES) as a primary ligand and 2,2-bipyridine as a secondary ligand were prepared. The new complexes were characterized by, Molar conductance measurement, magnetic susceptibility, Uv-visible spectra (Uv-Vis), infrared spectroscopy (FT-IR), Nuclear magnetic resonance(¹H-NMR), Thermogravimetric analysis (TGA-DTA) and atomic absorption spectroscopy(ASS). FT-IR and ¹H-NMR spectra indicate that both ligands 3-APTES and 2,2-bipyridine are coordinated to the metal ions via nitrogen amino group in 3-APTES and nitrogen atoms for bpy. Molar conductance value for the complexes indicate that the complex are non-electrolyte. The TGA-DTA analysis shows that the degradation of complexes occurs between 200-593 °C. The complexes assume octahedral geometry in which the Co(II),Ni(II),Cu(II) have two molecules of 3-APTES and one molecule from 2,2-bipyridine in the coordination sphere.