Amoureux Jean-Paul, Trébosc Julien, Hu Bingwen, Halpern-Manners Nicholas, Antonijevic Sasa
Unité de Catalyse et Chimie du Solide, UMR-CNRS 8181, Université de Lille 1, 59652 Villeneuve d'Ascq cedex, France.
J Magn Reson. 2008 Oct;194(2):317-20. doi: 10.1016/j.jmr.2008.07.021. Epub 2008 Jul 29.
It was recently shown that nuclear magnetic resonance (NMR) spectra of nitrogen-14 (spin I=1) can be obtained by indirect detection via spin S=1/2 nuclei in powders spinning at the magic angle. An increased number of solid-state NMR methods are now available to tailor sequences for specific purposes, e.g., hetero-nuclear dipolar recoupling or homo-nuclear dipolar decoupling schemes. Here, we combine the latest recoupling and decoupling techniques to obtain high-resolution (1)H-(13)C through-space correlation spectra, where only the correlation peaks of those carbons close to nitrogen nuclei are observed. The experiment is demonstrated on a (13)C enriched l-histidine. HCl x H(2)O powder sample.
最近研究表明,通过在魔角旋转的粉末中利用自旋S = 1/2原子核进行间接检测,可以获得氮-14(自旋I = 1)的核磁共振(NMR)谱。现在有越来越多的固态NMR方法可用于为特定目的定制序列,例如异核偶极重耦合或同核偶极去耦方案。在此,我们结合最新的重耦合和去耦技术来获得高分辨率的(1)H-(13)C空间相关谱,其中仅观察到那些靠近氮原子核的碳的相关峰。该实验在富含(13)C的l-组氨酸·HCl·H₂O粉末样品上进行了演示。
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