Practical aspects of real-time pure shift HSQC experiments.

Practical aspects of real-time pure shift HSQC experiments.
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DOI:
10.1002/mrc.4704
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发表时间:
2018-10
期刊:
Magnetic resonance in chemistry : MRC
影响因子:
--
通讯作者:
Morris GA
Morris GA
中科院分区:
其他
文献类型:
--
作者:
Kiraly P;Nilsson M;Morris GA

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纯位移核磁共振谱已成为一种有效的工具,以提高分辨率的质子核磁共振谱,通过消除的影响,homologous耦合。引入真实的-时间采集方法,可以避免纯位移NMR的主要缺点,即需要较长的实验时间。真实的-时间方法使用J-重新聚焦脉冲序列元素的周期性应用,获得单个自由感应衰减,与通过连接多个自由感应衰减的摘录来构建纯移位干涉图的先前方法相反。在重要的异质结单量子关联实验中,实现真实的时间纯位移数据采集通常会导致分辨率和灵敏度的同时提高。本文将在异质单量子关联实验的背景下讨论真实的时间纯位移获取方法的局限性和问题。我们的目标是提供详细的技术挑战,以及一个实用的指南,以充分利用这些方法的潜力。
Pure shift NMR spectroscopy has become an efficient tool for improving resolution in proton NMR spectra by removing the effect of homonuclear couplings. The introduction of real‐time acquisition methods has allowed the main drawback of pure shift NMR, the long experiment times needed, to be circumvented. Real‐time methods use periodic application of J‐refocusing pulse sequence elements, acquiring a single free induction decay, in contrast to previous methods that construct a pure shift interferogram by concatenating excerpts from multiple free induction decays. In the important heteronuclear single‐quantum correlation experiment, implementing real‐time pure shift data acquisition typically leads to the simultaneous improvement of both resolution and sensitivity. The current limitations of and problems with real‐time pure shift acquisition methods are discussed here in the context of heteronuclear single‐quantum correlation experiments. We aim to provide a detailed account of the technical challenges, together with a practical guide to exploiting the full potential of such methods.
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