A new unsymmetrical Schiff base ligand (H_2LLi) was synthesized using L-lysine, o-vanillin and salicylaladyde. Three solid metal complexes of this ligand [Ln(H_2L)(NO_3)] NO_3·2H_2O (Ln=Sm, Ho, Tm) were prepared ...A new unsymmetrical Schiff base ligand (H_2LLi) was synthesized using L-lysine, o-vanillin and salicylaladyde. Three solid metal complexes of this ligand [Ln(H_2L)(NO_3)] NO_3·2H_2O (Ln=Sm, Ho, Tm) were prepared and characterized by elemental analyses, IR spectra, UV spectra, TG-DTG and molar conductance. The ligand synthesized are chelating agent. The nitrogen atoms of Schiff base, oxygen atoms of hydroxybenzene, methoxide and carboxyl are all coordinated to the metal ions. Carboxyl and the nitrate ion within the coordination sphere are coordinated to the metal ion in a mondentate or bidentate fashion. Water molecules are lied in crystal substances. The antibacterial activity of the ligand and its complexes was also studied. The antibacterial experiments indicate that they have antibacterial activity to E. coli, S. aureus, B. subtilis and the complexes have higher activity than the ligand.展开更多
合成了Ln(Ⅲ)(Ln=Gd、Dy、Nd、Er、La、Sm)与糠醛缩 L 酪氨酸席夫碱的6种配合物,通过元素分析、红外光谱、紫外光谱、摩尔电导和热重分析,得到了配合物的组成为[Ln(C14H12NO4)(NO3)(H2O)2](NO3)(H2O)x(x=0～2)。得到了Er配合物的热分解...合成了Ln(Ⅲ)(Ln=Gd、Dy、Nd、Er、La、Sm)与糠醛缩 L 酪氨酸席夫碱的6种配合物,通过元素分析、红外光谱、紫外光谱、摩尔电导和热重分析,得到了配合物的组成为[Ln(C14H12NO4)(NO3)(H2O)2](NO3)(H2O)x(x=0～2)。得到了Er配合物的热分解反应动力学机理。展开更多
A new unsymmetrical Schiff base ligand (H2LLi) was synthesized using L-lysine, salicylaldehyde and 2-hydroxy-1-naphthaldehyde. Three solid metal complexes of this ligand \[Ln(H2L)(NO3)\] NO3·2H2O (Ln=La, Sm, Ho) ...A new unsymmetrical Schiff base ligand (H2LLi) was synthesized using L-lysine, salicylaldehyde and 2-hydroxy-1-naphthaldehyde. Three solid metal complexes of this ligand \[Ln(H2L)(NO3)\] NO3·2H2O (Ln=La, Sm, Ho) have been prepared and characterized by elemental analyses, IR spectra, UV spectra, TG-DTG and molar conductance. The antibacterial activities of the ligand and its complexes are also studied. The antibacterial experiments indicate that the ligand and its complexes possess antibacterial activity against Escherichia coli, Staphylococcus aureus and Bacillus subtilis and that the complexes have higher activity than those of the ligand.展开更多
文摘A new unsymmetrical Schiff base ligand (H_2LLi) was synthesized using L-lysine, o-vanillin and salicylaladyde. Three solid metal complexes of this ligand [Ln(H_2L)(NO_3)] NO_3·2H_2O (Ln=Sm, Ho, Tm) were prepared and characterized by elemental analyses, IR spectra, UV spectra, TG-DTG and molar conductance. The ligand synthesized are chelating agent. The nitrogen atoms of Schiff base, oxygen atoms of hydroxybenzene, methoxide and carboxyl are all coordinated to the metal ions. Carboxyl and the nitrate ion within the coordination sphere are coordinated to the metal ion in a mondentate or bidentate fashion. Water molecules are lied in crystal substances. The antibacterial activity of the ligand and its complexes was also studied. The antibacterial experiments indicate that they have antibacterial activity to E. coli, S. aureus, B. subtilis and the complexes have higher activity than the ligand.
文摘合成了Ln(Ⅲ)(Ln=Gd、Dy、Nd、Er、La、Sm)与糠醛缩 L 酪氨酸席夫碱的6种配合物,通过元素分析、红外光谱、紫外光谱、摩尔电导和热重分析,得到了配合物的组成为[Ln(C14H12NO4)(NO3)(H2O)2](NO3)(H2O)x(x=0～2)。得到了Er配合物的热分解反应动力学机理。
文摘A new unsymmetrical Schiff base ligand (H2LLi) was synthesized using L-lysine, salicylaldehyde and 2-hydroxy-1-naphthaldehyde. Three solid metal complexes of this ligand \[Ln(H2L)(NO3)\] NO3·2H2O (Ln=La, Sm, Ho) have been prepared and characterized by elemental analyses, IR spectra, UV spectra, TG-DTG and molar conductance. The antibacterial activities of the ligand and its complexes are also studied. The antibacterial experiments indicate that the ligand and its complexes possess antibacterial activity against Escherichia coli, Staphylococcus aureus and Bacillus subtilis and that the complexes have higher activity than those of the ligand.
