Developments of SASS-NMR methods and the spectrometer

1.建立了SASS-NMR谱仪。2.编制了SASS-NMR谱仪的计算机程序，实现了SASS-NMR谱仪的运行、各系统的控制和数据处理。3.成功地进行了SASS-NMR的实验研究。4.发展了三维SASS-NMR技术，并将其应用于甲酸钙的小振动研究。5.提出了利用选择性射频辐照和旋转轴切换分别获得化学性质不同的核的单个粉末谱的一维SASS-NMR技术，这与先前的2D方法相比大大节省了时间。6.采用SASS-NMR方法分别获得了客体二茂铁分子、、和环糊精-二茂铁包合物的C-13化学位移各向异性粉末谱图。包合的二茂铁分子进行C5旋转。岁差和天平动

1.A spectrometer for SASS-NMR was built.2.Computer programs for execution of SASS-NMR, control of various systems, and data manipulation were made. A simulation program of 1D and 2D powder patterns were also made for the data analysis.3.SASS-NMR was successfully performed-using a test sample.4.3D SASS-NMR was developed, which was applied to study small vibrations in calcium formate.5.lD SASS-NMR techniques for separately obtaining individual powder patterns for chemically distinct nuclei using selective rf irradiation and switching of the spinner axis were proposed, which considerably save time compared with the previous 2D approaches. A method has been applied for simultaneously obtaining all of the C-1 chemical -shift powder patterns in p-diacetylbenzene.6.The individual powder patterns due to C-13 chemical shift anisotropy in guest ferrocene molecules of , , and cyclodextrin-ferrocene clathrates were separately obtained using SASS-NMR. Enclathrated ferrocene molecules were concluded to undergo C5 rotation. precessio and libration.