The 2D QUADSHIFT experiment: Separation of deuterium chemical shifts and quadrupolar couplings by two‐dimensional solid‐state MAS NMR spectroscopy
The 2D QUADSHIFT experiment: Separation of deuterium chemical shifts and quadrupolar couplings by two‐dimensional solid‐state MAS NMR spectroscopy
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2D QUADSHIFT 实验：通过二维固态 MAS NMR 光谱分离氘化学位移和四极耦合
DOI：
10.1002/mrc.1260320710
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发表时间：
1994
影响因子：
2
通讯作者：
H. Günther
中科院分区：
文献类型：
--
作者：
N. Chandrakumar;Gero von Fircks;H. Günther
介绍了二维QUADSHIFT实验，该实验实现了固体魔角旋转粉末样品核磁共振谱中化学位移和四极耦合的分离。将该技术应用于慢魔角纺丝工艺中的部分氢化樟脑和樟脑。获得了低至0.2ppm的双量子化学位移分辨率，双量子线宽在6-12赫兹范围内。分离和关联的氚化学位移和四极偶合显示了个别位置。
The two‐dimensional QUADSHIFT experiment is introduced, which permits the separation of chemical shifts and quadrupolar couplings in solid‐state magic angle spinning NMR spectra of powder samples. The technique was applied to partially deuteriated norcamphor and camphor under slow magic angle spinning. Double quantum chemical shift resolutions down to 0.2 ppm were achieved, with double quantum linewidths in the range 6–12 Hz. Separation and correlation of deuterium chemical shifts and quadrupolar couplings is demonstrated for individual sites.