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首页> 外文期刊>International Journal of Spectroscopy >The Application of Simple and Easy to Implement Decoupling Pulse Scheme Combinations to Effect Decoupling of LargeJValues with Reduced Artifacts
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The Application of Simple and Easy to Implement Decoupling Pulse Scheme Combinations to Effect Decoupling of LargeJValues with Reduced Artifacts

机译：简单易实现的解耦脉冲方案组合在减少伪像的情况下实现大J值解耦的应用

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摘要

Of the various problems in decoupling one nucleus type from another using standard decoupling pulse schemes for broadband decoupling, a particular challenge is to effect full, artifact-free decoupling when the size of the coupling constant is very large. Herein it is demonstrated that1H decoupling of the31P NMR spectrum of diethyl phosphonate{HP(=O)(OCH2CH3)2}can be accomplished with reduced artifacts despite the largeJH,P1value of 693 Hz by using a combination of decoupling pulse schemes involving continuous-wave (CW) irradiation and either adiabatic-pulse decoupling (APD), MPF decoupling, or traditional composite-pulse decoupling (CPD) schemes such as WALTZ or GARP. The considered strategy is simple, efficient, and easy to implement on most instruments. The best result was attained for a combination of CW and CPD using GARP with a standard pulse width of 60 μs. Altogether, the advantages of the methodology include low power requirements, complete decoupling, tolerance of a range of largeJvalues, large bandwidth for normal-sizedJvalues, and the suppression of sidebands.
机译：在使用宽带去耦的标准去耦脉冲方案将一个核类型从另一个核中解耦的各种问题中，一个特别的挑战是当耦合常数的大小很大时如何实现完全无伪影的去耦。本文证明，尽管结合了连续波的解耦脉冲方案，尽管693，的大JH，P1值为693 Hz，但膦酸二乙酯{HP（= O）（OCH2CH3）2}的31 P NMR光谱的1 H解耦仍可实现。 （CW）辐射以及绝热脉冲解耦（APD），MPF解耦或传统的复合脉冲解耦（CPD）方案，例如WALTZ或GARP。所考虑的策略是简单，高效且易于在大多数工具上实施的。使用标准脉冲宽度为60μs的GARP进行CW和CPD的组合可获得最佳结果。总之，该方法的优势包括低功耗要求，完全去耦，对大J值范围的容忍度，正常大小的J值的大带宽以及边带抑制。

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