中国物理B ›› 2014, Vol. 23 ›› Issue (6): 63201-063201.doi: 10.1088/1674-1056/23/6/063201

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

Fast high-resolution nuclear magnetic resonance spectroscopy through indirect zero-quantum coherence detection in inhomogeneous fields

柯汉平, 陈浩, 林雁勤, 韦芝良, 蔡淑惠, 张志勇, 陈忠   

  1. Department of Electronic Science, Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance, Xiamen University, Xiamen 361005, China
  • 收稿日期:2013-09-16 修回日期:2013-11-19 出版日期:2014-06-15 发布日期:2014-06-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11275161 and 11105114).

Fast high-resolution nuclear magnetic resonance spectroscopy through indirect zero-quantum coherence detection in inhomogeneous fields

Ke Han-Ping (柯汉平), Chen Hao (陈浩), Lin Yan-Qin (林雁勤), Wei Zhi-Liang (韦芝良), Cai Shu-Hui (蔡淑惠), Zhang Zhi-Yong (张志勇), Chen Zhong (陈忠)   

  1. Department of Electronic Science, Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance, Xiamen University, Xiamen 361005, China
  • Received:2013-09-16 Revised:2013-11-19 Online:2014-06-15 Published:2014-06-15
  • Contact: Lin Yan-Qin, Cai Shu-Hui E-mail:linyq@xmu.edu.cn;shcai@xmu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11275161 and 11105114).

摘要: In many cases, high-resolution nuclear magnetic resonance (NMR) spectra are virtually impossible to obtain by conventional nuclear magnetic resonance methods because of inhomogeneity of magnetic field and inherent heterogeneity of sample. Although conventional intramolecular zero-quantum coherence (ZQC) can be used to obtain high-resolution spectrum in inhomogeneous field, the acquisition takes rather long time. In this paper, a spatially encoded intramolecular ZQC technique is proposed to fast acquire high-resolution NMR spectrum in inhomogeneous field. For the first time, the gradient-driven decoding technique is employed to selectively acquire intramolecular ZQC signals. Theoretical analyses and experimental observations demonstrate that high-resolution NMR spectral information can be retrieved within several scans even when the field inhomogeneity is severe enough to erase most spectral information. This work provides a new way to enhance the acquisition efficiency of high-resolution intramolecular ZQC spectroscopy in inhomogeneous fields.

关键词: nuclear magnetic resonance, intramolecular zero-quantum coherence, inhomogeneous magnetic fields, spatial encoding

Abstract: In many cases, high-resolution nuclear magnetic resonance (NMR) spectra are virtually impossible to obtain by conventional nuclear magnetic resonance methods because of inhomogeneity of magnetic field and inherent heterogeneity of sample. Although conventional intramolecular zero-quantum coherence (ZQC) can be used to obtain high-resolution spectrum in inhomogeneous field, the acquisition takes rather long time. In this paper, a spatially encoded intramolecular ZQC technique is proposed to fast acquire high-resolution NMR spectrum in inhomogeneous field. For the first time, the gradient-driven decoding technique is employed to selectively acquire intramolecular ZQC signals. Theoretical analyses and experimental observations demonstrate that high-resolution NMR spectral information can be retrieved within several scans even when the field inhomogeneity is severe enough to erase most spectral information. This work provides a new way to enhance the acquisition efficiency of high-resolution intramolecular ZQC spectroscopy in inhomogeneous fields.

Key words: nuclear magnetic resonance, intramolecular zero-quantum coherence, inhomogeneous magnetic fields, spatial encoding

中图分类号:  (Magnetic resonance spectra)

  • 32.30.Dx
82.56.-b (Nuclear magnetic resonance)