波谱学杂志Issue(2)：363-372,10.DOI:10.11938/cjmr20150218
优化初始脉冲增强多量子跃迁及卫星跃迁魔角旋转谱灵敏度
Sensitivity Enhancement of Multiple Quantum and Satellite Transition Magic Angle Spinning Spectra by Optimizing the Initial State
摘要
Abstract
A method to significantly enhance the sensitivity of the widely used multiple quantum magic angle spinning (MQMAS), satellite transition magic angle spinning (STMAS) and their variants is proposed. By introducing a preparatory period prior to the normal multiple quantum excitation or satellite transition pulse, the initial state can be optimized so that the recycle delay time can be substantially reduced. The performance of this method, for both MQMAS and STMAS in two different magnetic fields, has been demonstrated with a number of representative nuclear species (23Na,11B and87Rb). This method can be implemented, without any additional hardware or software accessories, on all conventional solid-state NMR spectrometers with operating magnetic field as low as 4.7 T and sample spinning speed as slow as 6 kHz. Moreover, it is a very flexible method so that it can be customized, i.e., for individual compounds, the experimental parameters can be optimized for each compound following a step-by-step procedure specified in this work although a full theoretical exposition will be provided separately.关键词
固体核磁共振/四极核/多量子跃迁魔角旋转/卫星跃迁魔角旋转/脉冲优化Key words
solid-state NMR/quadrupolar nuclei/MQMAS/STMAS/pulse optimization分类
数理科学引用本文复制引用
郑人豪,吴振,黄柏绮,柯志正,丁尚武..优化初始脉冲增强多量子跃迁及卫星跃迁魔角旋转谱灵敏度[J].波谱学杂志,2015,(2):363-372,10.基金项目
The “National Science Council”(NSC 102-2113-M-110-004, MOST 103-2113-M-110-006) （NSC 102-2113-M-110-004, MOST 103-2113-M-110-006）
