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化学学报
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化学学报 ›› 2001, Vol. 59 ›› Issue (3): 417-420. 上一篇    下一篇

研究论文

稀土与脂肪族Schiff碱多核配合物的合成及波谱

姚克敏;吴静;徐青;朱力明;沈联芳   

  1. 浙江大学化学系.杭州(310027);杭州师范学院化学系;中国科学院武汉物理与 数学研究所;波谱与原子分子物理国家重点实验室
  • 发布日期:2001-03-15

Synthesis and magnetic resonance spectra of rare earth polynuclear complexes with aliphatic schiff base

Yao Kemin;Wu Jing;Xu Qing;Zhu Liming;Shen Lianfang   

  1. Zhejiang Univ, Dept Chem.Hangzhou(310027)
  • Published:2001-03-15

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505

被引次数

7 | 1

在形成多核配合物的诸条件中，认为减小空间位阻颇为重要，设计的直链脂肪族的四甘醇醛与甘氨酸缩合形成的Schiff碱(TAGL)为此提供了有利的条件，且成功地获得了它与稀土离子反应形成的三核配合物(Ln:L=3:1):[Ln~3(TAGL)(NO~3)~7]CH~3OH·nH~2O(Ln=La,Nd,Sm,n=1;Ln=Gd,Dy,Yb,Y,n=2)。以元素分析，IR，NMR等确证其组成，根据EPR谱探讨了Gd(III)配合物的晶体场强，同时见到该类脂肪族Schiff碱及其配合物中δ~H~C~=~N的质子谱向高场明显位移至～5.10。

关键词: 稀土金属络合物, 席夫碱, 甘氨酸, 核磁共振谱法, 顺磁共振, 镧络合物, 钕络合物, 钆络合物, 镝络合物, 镱络合物

Among various factors affecting formation of polynuclear complex, steric hindrance is considered to be especially important. An aliphatic Schiff base (TAGL) from tetraglycol aldehyde and glycine offers a possible means to reduce steric hindrance. Some trinuclear rare earth complexes (Ln:L=3:1) were synthesized and their formulas were established as [Ln~3(TAGL) (NO~3)~7] CH~3OH·nH~2O (Ln=La, Nd, Sm, n=1; Ln=Gd, Dy, Yb, Y, n=2) by elemental analysis, IR, NMR etc. On the basis of EPR spectrum of the obtained Gd(III) complex, the crystal field strength is discussed. In addition, the proton signal of δ~H~C~=~N in this aliphatic Schiff base showed obvious upfield shift and appeared at ～5.10, which made spectral assignment much easier.

Key words: RARE EARTH METAL COMPLEX, SCHIFF BASE, GLYCINE, NMR SPECTROMETRY, PARAMAGNETIC RESONANCE, LANTHANUM COMPLEX, NEODYMIUM COMPLEX, GADOLINIUM COMPLEX, DYSPROSIUM COMPLEX, YTTERBIUM COMPLEX

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