Khaneja Navin
Division of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
J Magn Reson. 2006 Dec;183(2):242-51. doi: 10.1016/j.jmr.2006.08.017. Epub 2006 Sep 25.
In this paper, we introduce a class of dipolar recoupling experiments under magic angle spinning (MAS), which use gamma dependent antiphase polarization during the t1 evolution period. We show that this helps us to design dipolar recoupling experiments that transfer both components of the transverse magnetization of spin S to a coupled spin I in the mixing step of a 2D NMR experiment. We show that it is possible to design such transfer schemes and make them insensitive to the orientation dependency of the couplings in powders. This helps us to develop sensitivity enhanced 2D NMR experiments of powder samples under MAS.
在本文中，我们介绍了一类在魔角旋转（MAS）下的偶极重耦合实验，这些实验在t1演化期使用与γ相关的反相极化。我们表明，这有助于我们设计偶极重耦合实验，在二维核磁共振实验的混合步骤中将自旋S横向磁化的两个分量转移到耦合自旋I上。我们表明，可以设计这样的转移方案，并使其对粉末中耦合的取向依赖性不敏感。这有助于我们开发在MAS下粉末样品的灵敏度增强的二维核磁共振实验。
