TWO-DIMENSIONAL ROTATIONAL SPIN-ECHO NUCLEAR MAGNETIC-RESONANCE IN SOLIDS - CORRELATION OF CHEMICAL-SHIFT AND DIPOLAR INTERACTIONS
TWO-DIMENSIONAL ROTATIONAL SPIN-ECHO NUCLEAR MAGNETIC-RESONANCE IN SOLIDS - CORRELATION OF CHEMICAL-SHIFT AND DIPOLAR INTERACTIONS
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DOI：
10.1021/ja00400a007
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发表时间：
1981-01-01
影响因子：
15
通讯作者：
HUANG, TH
中科院分区：
文献类型：
--
作者：
MUNOWITZ, MG;GRIFFIN, RG;HUANG, TH
二维核磁共振技术分离的化学位移和异极偶极相互作用被应用到样品旋转的魔角。由于两种相互作用的不均匀性，在每个维度的时域中观察到旋转回波。相应的傅里叶变换产生旋转边带光谱，提供信息的主值和相对取向的位移和偶极张量，并从后者，核间距离可以计算。因此，所述技术提供了用于获得粉末样品中的结构数据（例如，13 C-1H和15 1 N-1H距离）的手段。
Two-dimensional NMR techniques whichseparate the chemical shift and heteronuclear dipolar interactions are applied to samples spinning at the magic angle. Because of the inhomogeneous nature of the two interactions, rotational echoes are observed in the time domain of each dimension. The corresponding Fourier transforms yield rotational sideband spectra which provide information on the principal values and relative orientations of the shift and dipolar tensors, and, from the latter, internuclear distances may be calculated. The techniques therefore provide a means for obtaining structural data, for example, l3C-'H and 15 1N-'H distances, in powder samples.