波谱学杂志 ›› 1996, Vol. 13 ›› Issue (1): 11-17.

• 研究论文 • 上一篇    下一篇

一种新的测定一维同核全相关的NMR技术

缪振春, 罗毅, 杜泽涵, 冯锐   

  1. 军事医学科学院毒物药物研究所, 北京 100850
  • 收稿日期:1995-04-21 修回日期:1995-06-05 出版日期:1996-02-05 发布日期:2018-01-17

A NEW NMR TECHNIQUE FOR MEASUREMENT OF 1D HOMONUCLEAR TOTAL CORRELATION

Miao Zhenchun, Luo Yi, Du Zehan, Feng Rui   

  1. Institute of Pharmacology and Toxicology, Academy of Military MedicalSciences, Beijing 100850
  • Received:1995-04-21 Revised:1995-06-05 Online:1996-02-05 Published:2018-01-17

摘要: 提出一种新的基于MDY混合脉冲的可测定一维同核全相关的核磁共振技术.称为一维自旋回波MDY相干转移(lD-SEMDY)实验.结果表明.它具有下列突出优点:一是不用Z-滤波技术就可以得到纯吸收型的一维全相关谱(lD-TOCSY).与同类技术相比,操作简便.可节省测定时间.应用范围较广;二是所测定亚谱中的信号归属通过改变混合时间和延迟时间可以得到确定;三是相干转移非常有效.远程磁化转移信号的灵敏度比较高,对弱偶合的自旋体系也可进行测定.以甙类化合物为例讨论了它在谱峰高度重叠的有机结构测定中的应用.

关键词: 一维同核相干转移核磁共振技术, 混合脉冲, 甙类化合物的结构测定, 一维全相关谱, 核磁共振

Abstract: A new NMR technique for measurement of 1D Homonuclear Total Correlation,called the one-dimensional spin echo MDY coherence transfer (1D-SEMDY) was developed.The results obtained show that the efficiency of magnetization transfer among sugar residues of glycoside are much batter for this method than that for 1D-HOHAHA,1D-relayed HOHAHA or 1D multiple relay COSY and a 1D-TOCSY spectrum with all peaks in the absorption mode can be obtained without the use of the Z-filter.The subspectra obtained by the technique show clear lineshapes and good resolution.Spectral assignment within the subspectra can be achieved by varation of mixing time and delay time.

Key words: 1D-SEMDY NMR techniques, Structure analysis of glycoside, NMR subspectra, Mixing pulse