波谱学杂志 ›› 2019, Vol. 36 ›› Issue (4): 456-462.doi: 10.11938/cjmr20192775

• 研究论文 • 上一篇    下一篇

用于测量J偶合常数的同时多层选择性恒时J分解谱的方法

陈金永1, 曾庆1, 林雁勤1,2, 陈忠1   

  1. 1. 厦门大学 电子科学系, 福建省等离子体与磁共振研究重点实验室, 固体表面物理化学国家重点实验室, 福建 厦门 361005;
    2. 厦门大学 深圳研究院, 广东 深圳 518057
  • 收稿日期:2019-08-09 出版日期:2019-12-05 发布日期:2019-11-29
  • 通讯作者: 林雁勤 E-mail:linyq@xmu.edu.cn
  • 基金资助:
    the National Natural Science Foundation of China (U1732158 and U1632274); the Key Science and Technique Project of Fujian Province (2018Y0077); the Natural Science Foundation of Guangdong Province (2018A030313794); the Fundamental Research Funds for the Central Universities (20720170036).

Simultaneous Multi-Slice Selective Constant-Time J-Resolved Spectroscopy for Measuring J Values

CHEN Jin-yong1, ZENG Qing1, LIN Yan-qin1,2, CHEN Zhong1   

  1. 1. Department of Electronic Science, Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance, State Key Laboratory of Physical Chemistry and Solid Surfaces, Xiamen University, Xiamen 361005, China;
    2. Shenzhen Research Institute of Xiamen University, Shenzhen 518057, China
  • Received:2019-08-09 Online:2019-12-05 Published:2019-11-29
  • Supported by:
    the National Natural Science Foundation of China (U1732158 and U1632274); the Key Science and Technique Project of Fujian Province (2018Y0077); the Natural Science Foundation of Guangdong Province (2018A030313794); the Fundamental Research Funds for the Central Universities (20720170036).

摘要: 标量偶合是核磁共振(NMR)波谱的一个重要参数.其中氢-氢偶合能提供关于分子结构的有用信息.但是,在复杂的偶合网络中解析出氢-氢偶合常数(JH-H)较为困难.本文提出了一种基于空间编码选择性恒时演化的测量JH-H的方法,利用一次实验就能解析分子中所有氢核的偶合网络,并测量JH-H.该方法被称为同时多层选择性恒时J分解谱(SMS-SECTJRES).它结合空间编码梯度和选择性恒时演化,并利用平面回波谱成像(EPSI)采样模块,从不同的空间位置提取出对应不同氢核偶合网络的J分解谱,促进了NMR技术在分子结构解析中的进一步应用.

关键词: 核磁共振, 标量偶合, 选择性恒时, 平面回波谱成像, 分子结构解析

Abstract: Scalar coupling is an important parameter in nuclear magnetic resonance (NMR). The proton-proton coupling constant JH-H provides valuable information on molecular structure. However, determining JH-H value in complex coupling networks is still challenging. Here, we propose a method called simultaneous multi-slice selective constant-time J-resolved spectroscopy (SMS-SECTJRES) to measure JH-H values of all coupling networks of a molecule simultaneously in one experiment. In this method, gradient-encoded selective refocusing is used during a fixed evolution time, combined with echo planar spectroscopic imaging (EPSI) detection module to extract different selective J-edited spectra in different spatial positions. This new method is conducive to reveal coupling networks and the analysis of molecular structures.

Key words: nuclear magnetic resonance (NMR), scalar coupling, selective constant-time, echo planar spectroscopic imaging (EPSI), molecular structure elucidation

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