稀土(RE=Sm,Gd,Eu)乙二胺N,N-二(2-乙酰胺苯甲酸)二乙酸配合物合成、表征与性质  

Synthesis,Characterization and Properties of Rare Earth(RE=Sm,Gd,Eu) Ethylenediamine-N,N-di(2-acetamide benzoic acid)-diacetate Complexes

作　　者：郝志峰[1] 陈林渺[1] 马肖依[1] 刘文锋[1] 余坚[1] 余林[1] 

机构地区：[1]广东工业大学轻工化工学院,广东广州510006

出　　处：《中国稀土学报》2011年第1期18-23,共6页Journal of the Chinese Society of Rare Earths

基　　金：广东省自然科学基金资助项目(06021469;10251009001000003);广东省科技计划项目(2009B011000012;2010B010800029)资助

摘　　要：通过乙二胺四乙酸二酐(EDTAD)与邻氨基苯甲酸进行酰化反应,得到乙二胺N,N-二(2-乙酰胺苯甲酸)二乙酸配体(H4L),并分别与Sm、Gd和Eu稀土离子在乙醇-水溶液中反应得到系列稀土配合物。通过IR、摩尔电导率、UV、元素分析及热重-差热分析对配合物进行表征,得出配合物的化学组成为RE(HL).3H2O(RE=Sm,Gd,Eu)。IR表明,配体(H4L)形成配合物后出现了羧酸盐特有的反对称伸缩振动吸收峰νas,COO-和对称伸缩振动吸收峰νs,COO-,配体以羧酸根的形式与稀土离子配位。室温下测定了配合物的荧光激发光谱和发射光谱,Gd(HL).3H2O和Sm(HL).3H2O的荧光光谱中主要观察到配体强的发射峰,而配合物Eu(HL).3H2O还显示Eu离子的特征发射光谱,在597 nm处5D0→7F1跃迁的发射峰最强。循环伏安法研究配合物的电化学性质表明配合物都表现出不可逆的氧化还原过程。The ligand（H4L） ethylenediamine-N,N-di（2-acetamide benzoic acid）-diacetate was synthesized by acylation reaction of ethylenediamine tetraacetic acid dianhydride（EDTAD） and o-amniobenzoic acid.The rare earth complexes were prepared after the reaction of the ligand with Gd3＋,Sm3＋,Eu3＋ ions in the ethanol-water mixed solvent.The complexes were characterized by IR,1HNMR,mole conductivity,UV-Vis,element analysis and TG-DTA.The chemical composition of the complexes was confirmed to be RE（HL）·3H2O（RE=Sm,Gd,Eu）.The IR spectra indicated that all complexes exhibited the characteristic peaks of carboxylate,asymmetric stretching vibration νas,COO-and symmetric stretching vibration νs,COO-peaks.The excitation and emission spectra were recorded at room temperature.The main strong excitation peaks of the ligand were observed in the excitation spectra of the complex Gd（HL）·3H2O and Sm（HL）·3H2O,but the complex Eu（HL）·3H2O showed Eu ion characteristic emission bands.The intensity of the magnetism dipole transition 5D0→7F1 at 597 nm was the strongest.The investigation of cyclic voltammetry of the complexes showed that all the complexes exhibited irreversible oxidation-reduction processes.

关 键 词：乙二胺N N-二(2-乙酰胺苯甲酸)二乙酸 稀土配合物 荧光光谱 

分 类 号：O614.3[理学—无机化学]