Cross polarization in the tilted frame: assignment and spectral simplification in heteronuclear spin systems
Cross polarization in the tilted frame: assignment and spectral simplification in heteronuclear spin systems
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DOI：
10.1080/00268979809483251
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发表时间：
1998-12-20
影响因子：
1.7
通讯作者：
Griffin, RG
中科院分区：
文献类型：
--
作者：
Baldus, M;Petkova, AT;Griffin, RG
针对旋转固体引入了一种频率选择性异核极化转移技术。在此方法中，施加与频率偏移相当的射频场以建立哈特曼 - 哈恩交叉极化，该极化因此明确取决于所涉及核的共振偏移。在这些条件下，可以实现光谱诱导滤波与交叉极化相结合（SPECIFIC CP），并且证明其对于异核自旋对的光谱简化或归属是有用的。阐述了设计原理，并在碳 - 13、氮 - 15标记的氨基酸上进行了实验演示。
A frequency selective heteronuclear polarization transfer technique is introduced for rotating solids. In this method, radiofrequency fields comparable with the frequency offsets are applied to establish Hartmann-Hahn cross polarization that therefore depends explicitly on the resonance offset of the nuclei involved. Under these conditions, spectrally induced filtering in combination with cross polarization (SPECIFIC CP) can be achieved and is demonstrated to be useful for spectral simplification or assignment in heteronuclear spin pairs. The design principles are outlined and demonstrated experimentally on C-13, N-15 labelled amino acids.