The synthesis of a tripod Schiff-base ligand and its eight complexes with rare earth metals are reported. All compounds were characterized by elemental analysis, IR, 1H NMR, TG-DTA and molar conductance measurements. ...The synthesis of a tripod Schiff-base ligand and its eight complexes with rare earth metals are reported. All compounds were characterized by elemental analysis, IR, 1H NMR, TG-DTA and molar conductance measurements. The results show that these complexes \ NO 3·nH 2O(n=3, Ln=La,Sm,Eu,Gd; n=4, Ln=Tb,Dy,Yb,Y) are 1∶1 electrolyte, where one nitrate radical is free, the other two nitrate radicals are in mono-dentate coordination with Ln(Ⅲ) ions; the coordination number is 9. The ligand exhibits good antioxidative activity at concentration of 1×10 -4 mol/L.展开更多
文摘The synthesis of a tripod Schiff-base ligand and its eight complexes with rare earth metals are reported. All compounds were characterized by elemental analysis, IR, 1H NMR, TG-DTA and molar conductance measurements. The results show that these complexes \ NO 3·nH 2O(n=3, Ln=La,Sm,Eu,Gd; n=4, Ln=Tb,Dy,Yb,Y) are 1∶1 electrolyte, where one nitrate radical is free, the other two nitrate radicals are in mono-dentate coordination with Ln(Ⅲ) ions; the coordination number is 9. The ligand exhibits good antioxidative activity at concentration of 1×10 -4 mol/L.
