波谱学杂志 ›› 1996, Vol. 13 ›› Issue (1): 47-52.

• 研究论文 • 上一篇    下一篇

Fe(Ⅲ)对脂肪酸13C NMR信号的影响

高令杰, 赵天增, 秦海林, 程森祥   

  1. 河南省科学院化学研究所, 郑州 450003
  • 收稿日期:1994-10-22 修回日期:1994-12-08 出版日期:1996-02-05 发布日期:2018-01-17

THE INFLUENCE OF Fe(Ⅲ) ON 13C NMR SIGNALS OF ALIPHATIC ACIDS

Gao Lingjie, Zhao Tianzeng, Qin Hailin, Cheng Shenxiang   

  1. The Institute or Chemistry, Henan Academy of Sciences, Zhengzhou 4500033
  • Received:1994-10-22 Revised:1994-12-08 Online:1996-02-05 Published:2018-01-17

摘要: 研究了Fe (Ⅲ)对脂肪酸13C NMR信号的影响.结果表明,Fe (Ⅲ)对脂肪酸13C NMR信号的影响的机理是电子自旋弛豫对核自旋弛豫的影响;产生这种影响的必要条件是Fe (Ⅲ)与脂肪酸之间的缔合.该影响沿化学键传递并随距离的增加而迅速衰减.破坏Fe (Ⅲ)与脂肪酸之间的缔合,可使这种影响消失.利用该现象可帮助某些化合物13C NMR信号的归属,并可对某些分子在溶液中的状态进行研究.

关键词: 脂肪酸, 13C NMR, 顺磁性物质

Abstract: The influence of Fe(Ⅲ) on 13C NMR signals of aliphatic acids was studied. It is shown that the machanism of the influence is the effect of electron spin relaxation on nuclear relaxation and the necessary factor of the influencc is the complexing between Fe(Ⅲ) and the aliphatic aled. It is indicated that the influence weakens rapidly with the increase of the distance. The normal spectra can be obtained by destroying the complexing between Fe(Ⅲ) and the aliphatic acid. This phenomenon can be used to help assign the 13C NMR spectra of some compounds. Fe(Ⅲ) may be used as a probe to study the behvaior of some organic compounds in solution.

Key words: 13C NMR, Aliphatic acids, Paramagnetic substance