双(吡啶-2-甲醛)缩对苯二胺稀土配合物的合成及抑菌活性

在无水乙醇介质中,合成出了双(吡啶-2-甲醛)缩对苯二胺(L)Schiff碱配体和它的6个新的稀土配合物。通过元素分析、摩尔电导率的测定、红外光谱分析和差热-热重分析等表征可知,配合物类型是2∶2型(RE∶L),电解质类型为1∶2型,可能结构通式为[RE2L2(Pic)4(H2O)2](Pic)2∶nH2O(RE=La、Ce、Pr、Nd,n=0;RE=Sm、Eu,n=2),其中心离子的配位数为9。通过琼脂扩散抑菌法测定了配合物的抑菌性能,结果表明,该系列配合物对金黄色葡萄球菌、大肠杆菌和枯草杆菌具有较好的抗菌活性。

Synthesis and Antibacterial Activity of Bis(pyridine-2-carboxaldehyde)-p-phenylenediamine Rare Earth Complexes

A Schiff base ligand derived from bis-pyridine-2-carboxaldehyde with p-phenylenediamine and its six new rare earth complexes were synthesized in ethanol.The complexes were characterized by elemental analysis,molar conductance, IR,thermogravimetric and magnetic measurements.The complex type is 2∶2 type(RE: L) and the electrolyte type is 1∶2 type.The likely formula for the complexes is inferred as [RE_2L_2(Pic)_4(H_2O)_2](Pic)_2·nH_2O(RE=La、Ce、Pr、Nd,n=0;RE=Sm、Eu,n=2),with the central rare earth ions attaining nine-coordination.The agar diffusion antibacterial test shows that the complexes are active against the Staphylococcus aureus,Escherichia coli and Bacillus subtilis.