波谱学杂志 ›› 1999, Vol. 16 ›› Issue (4): 302-311.

• 研究论文 • 上一篇    下一篇

最高量子相关谱技术在同核偶合常数测定中的应用(英文)

张许1,2, 刘买利1,2   

  1. 1. 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, 武汉 430071;
    2. 西北大学分析测试研究中心, 西安 710069
  • 收稿日期:1999-04-06 修回日期:1999-05-10 出版日期:1999-08-05 发布日期:2018-01-11
  • 通讯作者: 刘买利 E-mail:ml.liu@nmr.whwcnc.ac.cn
  • 作者简介:张许,男,1974年出生,博士生
  • 基金资助:
    国家自然科学基金(No:29875034),中国科学院"九五"基础性重大研究项目和波谱与原子分子物理国家重点实验室科研基金共同资助项目

MEASUREMENT OF HOMONUCLEAR COUPLING CONSTANTS USING TWO-DIMENSIONAL MAXIMUM-QUANTUM CORRELATION NMR SPECTROSCOPY (MAXY-NMR)

Zhang Xu1,2, Liu Maili1,2   

  1. 1. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071;
    2. Instrumental Analysis Research Center, Northwest University, Xi'an 710069
  • Received:1999-04-06 Revised:1999-05-10 Online:1999-08-05 Published:2018-01-11
  • Supported by:
    This work is supported by grants from NSF(No:29875034), the Chinese Academy of Sciences and the State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics.

摘要: 偶合常数是一个重要的NMR参数,其数值与分子中化学键的二面角有关,可以为分子结构研究提供很重要的信息.多维NMR谱由于具有较大的化学位移分辨率,因此常常被用来测定同核或异核自旋-自旋偶合常数.本文介绍了利用最高量子相关技术(MAXY)测定同核偶合常数的方法.MAXY是最近发展的一种多维NMR谱编辑技术,可以使不同官能团(CH,CH2,CH3)的相关峰分布于不同的图谱区域,因此比常规的二维谱具有更高的化学位移分辨率.而且被分离开来的NMR相关峰呈吸收性线型,能清楚地展示各自的偶合分裂特征,可以直接用于测定偶合常数.

关键词: 1HNMR, 偶合常数, 地塞米松, 多肽, 神经降压素

Abstract: It has been a continuous interest in measurement of homonuclear scalar coupling constants using two-dimensional NMR spectroscopy because large chemical shift dispersions can efficiently increase spectral resolution. Numerous methods have been developed using homo-and hetero-nuclear correlation and successfully used for a variety of samples. Here we demonstrate an alternative approach based on maximum-quantum correlation NMR spectroscopy (MAXY NMR). The new method combines the advantages of two-dimensional chemical shift dispersion and the spectral editing feature of the MAXY approach and results in separated correlations of CH, CH2, and CH3 groups in a single experiment with enhanced chemical shift resolution. The method had been tested on a middle-sized molecule, dexamethasone, and a tridecapeptide, neurotensin.

Key words: 1H NMR, MAXY, Coupling constants, Neurotensin, Peptide, Dexamethasone