波谱学杂志 ›› 2001, Vol. 18 ›› Issue (3): 281-289.

• 研究论文 • 上一篇    

分子间多量子相干横向弛豫时间(和自扩散系数)测量的参数优化和数据处理方法

郑绍宽1,2,陈忠1,2*,陈志伟2,廖新丽2   

  1. 厦门大学1.物理学系; 2.化学系,厦门  361005
  • 收稿日期:2001-05-25 修回日期:2001-06-21 出版日期:2001-09-05 发布日期:2001-09-05
  • 作者简介:郑绍宽(1966-),男,在职博士研究生.*通讯联系人: Tel: 0592-2183046,E-mail: chenz@jingxian.xmu.edu.cn
  • 基金资助:

    国家自然科学基金资助项目(10005006和19975038)和福建省自然 科学基金资助项目(C9910001).

THE OPTIMIZATION OF EXPERIMENTAL PARAMETER AND PROCESSING METHOD OF EXPERIMENTAL DATA FOR MEASUREMENT OF TRANSVERSE RELAXATION TIME (AND SELF-DIFFUSION COEFFICIENT) OF INTERMOLECULAR MULTIPLE QUANTUM COHERENCES IN NMR

ZHENG Shao-kuan1,2, CHEN Zhong1,2*, CHEN Zhi-wei2, LIAO Xin-li2
  

  1. 1.Dept. of Phys.; 2.Dept of Chem., Xiamen Univ., Xiamen  361005, China
  • Received:2001-05-25 Revised:2001-06-21 Online:2001-09-05 Published:2001-09-05
  • About author:*Corresponding author.
  • Supported by:

    国家自然科学基金资助项目(10005006和19975038)和福建省自然 科学基金资助项目(C9910001).

摘要:

针对测量横向弛豫时间T2的CPMG脉冲序列和我们所设计的可同时测量高极化单组份单 峰核自旋体系n阶分子间多量子相干横向弛豫时间T2,n和自扩散系数Dn的改进的CRAZED脉冲序列,分析了影响测量T2T2,n(或Dn)的各种因素,并着重从技术方面讨论了准确测量T2,nDn的实验参数优化和实验数据处理方法.

关键词: 核磁共振, 分子间多量子相干, 横向弛豫时间, 自扩散系数, 参数优化, 数据处理

Abstract:

In light of   the CPMG pulse sequence , which is used to measure the transverse rel axation time T2, and of  modified CRAZED pulse sequence, which is designe d to simultan eously measure the transverse relaxation time, T2,n and self-diffusi on coefficient , Dn, of intermolecular multiple quantum coherences (iMQCs) for a highly p olarized  spin system with only one type of spin species, all kinds of factors, which will   affect the measurement of T2T2,n(or Dn), are analyzed. T he processing method of the expe rimental data and the optimization of the experimental parameter for the accurat e measurement of  T2,n and Dn of iMQCs are discussed from the point of view of technique.

Key words: Nuclear magnetic resonance, Intermolecular multiple quantum coherences, Transverse relaxation time, Self-diffusion coefficient, Data manipulation, Optimization of experimental parameter

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