Development of a solid-state high-resolution two-dimensional NMR spectrometer

1. 研制了一种固态高分辨率二维核磁共振波谱仪，该波谱仪包括圆柱形含气样品旋转系统、旋转轴切换系统、VT CPMAS探针、转速稳定器等。用化学位移SASS 2D nmr - 3测定了< β > -喹啉-甲醇包合物中的<^(13)cb>化学位移张量。建立了刚性固体的2D-J核磁共振波谱法，并将其应用于< β > -喹啉-甲醇包合物和对二甲氧基苯。采用双极SASS - 2D nmr - 5准确测定了甲酸钙中CH键的长度。利用双极SASS二维核磁共振研究了包合物中分子的动态结构。

1. A solid-state high-resolution two-dimensional (2D) NMR spectrometer was developed, which involves a cylindrical gas-bearing samplespinning system, a rotation-axis switching system, a VT CPMAS probe, a rotation speed stabilizer etc.2. <^(13)C> chemical shift tensors in <beta> -quinol-methanol clathrate were determined by using chemical-shift SASS 2D NMR.3. 2D-J NMR spectroscopy for rigid solids was developed, and applied to <beta> -quinol-methanol clathrate and p-dimethoxybenzene.4. The CH bond lengths in calcium formate were accurately determined by using dipolar SASS 2D NMR.5. Dynamic structures of molecules trapped in some clathrates were studied by using dipolar SASS 2D NMR.