通过可变角度旋转核磁共振对动态平均固体中交叉极化的调制。
Modulation of cross polarization in motionally averaged solids by Variable Angle Spinning NMR.
作者信息
Espinosa Catalina A, Thureau Pierre, Shapiro Rebecca A, Litvak Ilya M, Martin Rachel W
机构信息
Department of Chemistry, University of California, Irvine 92697-2025.
出版信息
Chem Phys Lett. 2011 May 27;508(4-6):314-319. doi: 10.1016/j.cplett.2011.04.043.
Abstract
In systems where the dipolar couplings are partially averaged by molecular motion, cross-polarization is modulated by sample spinning. The cross-polariation efficiency in Variable Angle Spinning (VAS) and Switched Angle Spinning (SAS) experiments on mobile samples is therefore strongly dependent on the spinning angle. We describe simulations and experimental measurements of these effects over a range of spinning angles from 0° to 90°.
摘要
在偶极耦合通过分子运动部分平均化的系统中，交叉极化受样品旋转调制。因此，在可变角度旋转（VAS）和切换角度旋转（SAS）实验中，流动样品的交叉极化效率强烈依赖于旋转角度。我们描述了在0°至90°的一系列旋转角度范围内这些效应的模拟和实验测量。
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