首次合成了直链醚Schiff碱,乙酰丙酮缩二甘醇二胺(ACACDA),并以分步法得到它与稀土元素的九种新配合物:[Ln(ACACDA)_2(NO_3)](NO_3)_2·4H_2O(Ln-La,Pr,Nd,Sm,Gd,Tb,Er,Yb,Y).以紫外、红外光谱,特别是500MHz的NMR谱表征了配合物,通过其形成机理探讨,证明配合物中配体采取烯胺式构型形成稳定共轭结构.研究了Gd配合物的EPR谱,呈“U”谱特征,并出现“零场效应”,据此讨论了配合物中晶体场强度及Gd~(3+)周围的局部对称性. The first novel synthesis of linear ether Schiff base, acetylacetonated diglycol diamine (ACACDA), and in step by step with its rare earth elements nine new complexes: [Ln (ACACDA) _2 (NO_3)] (NO_3 ) _2 · 4H_2O (Ln-La, Pr, Nd, Sm, Gd, Tb, Er, Yb and Y) .The complexes were characterized by UV and IR spectra, The ligands in the complexes adopt the enamine structure to form a stable conjugate structure.The EPR spectra of Gd complexes are characterized by the “U” spectrum and “zero-field effect”, and the crystal fields Intensity and local symmetry around Gd ~ (3 +).