WATR法测量稀水溶液的1H-NMR谱

波谱学杂志 ›› 1988, Vol. 5 ›› Issue (2): 165-172.

WATR法测量稀水溶液的¹H-NMR谱

范世彦

中山大学测试中心

收稿日期:1987-05-25 修回日期:1987-08-11 出版日期:1988-06-05 发布日期:2018-01-22

¹H-NMR OF DILUTE AQUEOUS SOLUTIONS BY THE WATR METHOD

Fan Shiyan

Zhongshan University, Instrumentation Analysis and Research Center

Received:1987-05-25 Revised:1987-08-11 Online:1988-06-05 Published:2018-01-22

摘要/Abstract

摘要： 本文讨论了用WATR法消除稀水溶液中的水共振峰,进行¹H-NMR谱测定的原理、影响T₂的因素及应用实例。
WATR法是在水溶液中加入氯化胺、盐酸羟胺和盐酸胍等水质子交换试剂以降低水质子的T₂,然后用CPMG脉冲系列来测定¹H-NMB谱。
本法最适用于稀水溶液中处于水共振峰内或附近的样品的共振峰的测定,还可测定稀水溶液中¹⁵N-¹H的化学位移及耦合常数,到目前为止尚未见有这方面的报导。

关键词: 稀水溶液, 水质子交换试剂, CPMC脉冲系列, ¹H-NMR

Abstract: In this paper, the theoretical principle, the influential effect on T₂ of the water proton and application of a WATR method are discussed.
The method involves adding water proton exchange reagents, e. g.ammonium chloride, hydroxylamine hydro-chloride and guanidinium, into aqueous solutions to reduce T₂ of the water proton and then measuring ¹H-NMR spectra by CPMG pulse sequence.
The resonance of samples especially at or near the frequency of the water resonance in dilute aqueous solutions was clearly observable. The chemical shifts and coupling constants of ¹⁵N-¹H in dilute aqueous solutions were also observable, which up to now has never been reported about this aspect.

Key words: dilute aqueous solutious, proton exchange reagents, CPMG pulse sequence, ¹H-NMR

范世彦. WATR法测量稀水溶液的¹H-NMR谱[J]. 波谱学杂志, 1988, 5(2): 165-172.

Fan Shiyan. ¹H-NMR OF DILUTE AQUEOUS SOLUTIONS BY THE WATR METHOD[J]. Chinese Journal of Magnetic Resonance, 1988, 5(2): 165-172.

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WATR法测量稀水溶液的¹H-NMR谱

¹H-NMR OF DILUTE AQUEOUS SOLUTIONS BY THE WATR METHOD

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