RIKEN CLST-JEOL Collaboration Center, RIKEN, Yokohama, Kanagawa 230-0045, Japan.
RIKEN CLST-JEOL Collaboration Center, RIKEN, Yokohama, Kanagawa 230-0045, Japan; JEOL RESONANCE Inc., Musashino, Akishima, Tokyo 196-8558, Japan.
Solid State Nucl Magn Reson. 2017 Oct;87:104-110. doi: 10.1016/j.ssnmr.2017.06.004. Epub 2017 Jun 19.
Although very fast MAS rate (>60 kHz) paves a way to obtain a sufficient resolution in the H double-quantum magic-angle spinning (DQMAS) experiments to probe H proximities, the H resolution still limits wider applications below its potential use. Here, the combination of the DQMAS experiment with the constant-time (CT) acquisition approach is demonstrated, giving an increased peak-separation power in the DQ dimension. The advantages and disadvantages in terms of sensitivity and resolution of the conventional and CT approaches are discussed.
虽然非常高的 MAS 速率（>60 kHz）为在 H 双量子魔角旋转（DQMAS）实验中获得足以探测 H 近程的充分分辨率铺平了道路，但 H 分辨率仍然限制了其潜在用途的更广泛应用。在这里，展示了 DQMAS 实验与恒时（CT）采集方法的结合，在 DQ 维度上增加了峰分离能力。讨论了常规方法和 CT 方法在灵敏度和分辨率方面的优缺点。
