在极快速 MAS（旋转频率 νR = 35 kHz）条件下的 1H - 1H 双量子 CRAMPS NMR：一种用于探测固体中 1H - 1H 邻近关系的分辨率增强方法。
1H-1H double-quantum CRAMPS NMR at very-fast MAS (nuR=35 kHz): a resolution enhancement method to probe 1H-1H proximities in solids.
作者信息
Mafra Luís, Gomes José R B, Trébosc Julien, Rocha João, Amoureux Jean-Paul
机构信息
Department of Chemistry, University of Aveiro, Campus de Santiago, CICECO, 3810-193 Aveiro, Portugal.
出版信息
J Magn Reson. 2009 Jan;196(1):88-91. doi: 10.1016/j.jmr.2008.10.009. Epub 2008 Oct 12.
A High-resolution two-dimensional (2D) (1)H double-quantum (DQ) homonuclear recoupling experiments, combined with smooth amplitude-modulation (SAM) homonuclear decoupling is presented. The experiment affords highly resolved and clean (1)H DQ-SQ 2D spectra at very-fast MAS rates (nu(R)=35 kHz). The method is well suited to probe (1)H-(1)H distances in powdered solids and demonstrations are applied on a NaH(2)PO(4) powdered sample, an inorganic compound having hydrogen bonding networks.
本文提出了一种高分辨率二维（2D）氢（¹H）双量子（DQ）同核重新耦合实验，结合平滑幅度调制（SAM）同核去耦。该实验在非常快的魔角旋转速率（νR = 35 kHz）下能提供高分辨率且清晰的¹H DQ - SQ二维谱。该方法非常适合探测粉末状固体中的¹H - ¹H距离，并在NaH₂PO₄粉末样品（一种具有氢键网络的无机化合物）上进行了演示。
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