4-[(1,3-二氧代丁基)氨基]苯甲酸稀土配合物的合成、表征及发光性质

在乙醇体系中,由主配体4-(1,3-二氧代丁基)氨基]苯甲酸(H2L,C11H11NO4)、稀土硝酸盐及辅助配体邻菲啰啉(phen)反应合成了两个系列8个配合物Ln2(L)3(H2O)4]n(Ln=Sm(1),Eu(2),Tb(3),Dy(4));Ln2(NO3)2(L)2(phen)2]n(Ln=Sm(5),Eu(6),Tb(7),Dy(8))。用元素分析、红外光谱、摩尔电导、热重分析进行表征,确定了产物的化学组成,推断了相应的结构。测定了室温时固体产物的激发和发射光谱,结果表明:由主辅配体共同配位的三元配合物的发光强度好于无辅助配体参与的二元配合物。测定了三元配合物的荧光寿命,其中铕和铽配合物显示较长的荧光寿命。

Synthesis,Characterization and Fluorescent Properties of Rare Earth Complexes from 4-[(1,3-Dioxobutyl)amino]benzoic Acid

Eight rare earth complexes were synthesized by solution method using 4-(1,3-dioxobutyl)amino]benzoic acid(H2L,C11H11NO4),rare earth nitrate salts Ln(NO3)3·6 H2O and 1,10-phenanthroline(phen).They were binary complexesLn2(L)3(H2O)4]n(Ln=Sm(1),Eu(2),Tb(3),Dy(4))and ternary complexesLn2(NO3)2(L)2(phen)2]n(Ln=Sm(5),Eu(6),Tb(7),Dy(8)).The complexes were characterized by elemental analysis(EA),molar conductance,infrared spectroscopy(IR)and thermogravimetric analysis(TG).The compositions of the complexes were preliminarily determined and their possible structures were deduced.The excitation and emission spectra of the solid products at room temperature were measured.The results showed that the ternary complexes co-coordinated by the primary and secondary ligands have better luminescence intensity than the binary complexes without the auxiliary ligands.