Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400 005, India.
J Magn Reson. 2010 Oct;206(2):241-5. doi: 10.1016/j.jmr.2010.07.013. Epub 2010 Jul 27.
We demonstrate here the application of symmetry-based pulse sequences for homonuclear dipolar decoupling in solid-state NMR at magic-angle spinning (MAS) frequencies up to 65 kHz using moderate radiofrequency (RF) amplitudes. Theoretical arguments favouring the requirement of low RF amplitudes at high MAS frequencies are given for these sequences. A comparison with wPMLGmmxx¯ is given at 65 kHz of MAS frequency to emphasise that the symmetry-based pulse sequences have a lower RF amplitude requirement at high MAS frequencies.
我们在此展示了基于对称的脉冲序列在魔角旋转（MAS）频率高达 65 kHz 的固态 NMR 中的同核偶极去耦应用，同时使用了适中的射频（RF）幅度。对于这些序列，给出了理论论据来支持在高 MAS 频率下需要低 RF 幅度的要求。在 MAS 频率为 65 kHz 时，与 wPMLGmmxx¯ 进行了比较，以强调基于对称的脉冲序列在高 MAS 频率下需要较低的 RF 幅度。
