高等学校化学学报

高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (10): 1615.

• 研究论文 •    下一篇

核磁共振法研究DTPA-BIN稀土配合物的溶液结构

冯江华, 李晓晶, 李欣宇, 裴奉奎   

  1. 中国科学院长春应用化学研究所, 长春 130022
  • 收稿日期:2000-09-18 出版日期:2001-10-24 发布日期:2001-10-24
  • 通讯作者: 裴奉奎(1940年出生),男,研究员,博士生导师,从事波谱学技术、方法与应用研究.E-mail:peifk@ciac.ac.cn E-mail:peifk@ciac.ac.cn
  • 基金资助:

    波谱与原子分子物理国家重点实验室和长春市科技发展计划资助

Studies on the Solution Structures of Lanthanide(Ⅲ) Complexes of DTPA-BIN by NMR

FENG Jiang-Hua, LI Xiao-Jing, LI Xin-Yu, PEI Feng-Kui   

  1. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  • Received:2000-09-18 Online:2001-10-24 Published:2001-10-24

PDF (PC)

被引次数

11

摘要： 用核磁共振方法研究了抗磁稀土配合物Ln(DTPA-BIN)(Ln=La,Y,Lu,Sc)的水溶液结构.1H和13CNMR谱的谱形特征表明,每一种配合物在水溶液中存在着两种以上不对称的异构体,异构体之间的差别较小.并由Y3+与Gd3+离子半径的相似性推测出Gd(DTPA-BIN)的溶液结构,即DTPA-BIN分子提供8个配位点:3个骨架氮、3个乙羧基氧及2个酰胺氧1个水分子占据另一个配位点,从而与Gd3+形成了九配位结构.

关键词: 二乙三胺五乙酸-双(异烟肼)酰胺, 稀土配合物, 核磁共振, 溶液结构

Abstract: The solution structures of diamagnetic lanthanide(Ⅲ) complexes of DTPA-BIN(Ln=La, Y, Lu, Sc) have been investigated by 1H NMR, 13C NMRand 2D NMR. For each complex, two or more species of asymmetric conformations with little distinction were identified at room temperature. And their solution structures vary with the radius of the central metals. NMRspectra support the hypothesis that Sc3+ with smaller radius formed an eight-coordinated structure with DTPA-BIN, La3+ with larger radius formed nine or ten-coordinated structures with DTPA-BIN, and Y(DTPA-BIN) and Lu(DTPA-BIN) had nine-coordinated solution structures. The solution structure of Gd(DTPA-BIN) was obtained from the similarity of radius between Gd3+ and Y3+, which is a nine-coordinated structure formed by three nitrogens, three acetate oxygens, two acetyl oxygens, one water molecule and a gadolinium(Ⅲ) cation.

Key words: DTPABIN, Lanthanide complex, NMR, Solution structure

中图分类号: 

TrendMD: