High resolution H-1 spectra of powdered solids observed by Hahn echo pulse sequence with magic-angle spinning
文献类型：期刊论文
| 作者 | Ye, CH; Hu, JZ; Zhou, JY; Deng, F; Feng, HQ; Yang, NH; Li, LY |
| 刊名 | SOLID STATE NUCLEAR MAGNETIC RESONANCE
 |
| 出版日期 | 1996-02-01 |
| 卷号 | 6期号:1页码:85-94 |
| 关键词 | Cramps Delayed Acquisition Hahn Echo High Resolution H-1 Spectrum Magic-angle Spinning |
| ISSN号 | 0926-2040 |
| 文献子类 | Article |
| 英文摘要 | The H-1 magic-angle spinning (MAS) spectrum for a typical powdered solid is composed of a high resolution component and a broadline component. The high resolution component can be well isolated from the broadline component by the Hahn echo sequence with a long echo time. Compared with the CRAMPS experiment, which measures the proton system as a whole, the high resolution echo-MAS method measures only a fraction of the solid, which is usually small at room temperature and quite different from the majority of the solid in both molecular motion and chemical environment. It is shown that for a sample of fumaric acid monoethyl ester, the chemical shifts of the high resolution component are apparently distinguishable from the isotropic chemical shifts of the broadline component in the CRAMPS spectrum as the temperature approaches the melting point. In addition, for a sample of malonic acid, the echo-MAS spectrum is sensitive to moisture and temperature, while its corresponding CRAMPS spectrum is not. It is suggested that the molecules which produce the high resolution component are related to the lattice defects in a solid, including the surface disorder of the polycrystallites, while the molecules that generate the broadline component are located on the rigid lattice of the solid. |
| WOS关键词 | NUCLEAR MAGNETIC-RESONANCE ; NMR ; H-1-NMR ; SPECTROSCOPY ; DIFFUSION ; ROTATION |
| WOS研究方向 | Chemistry ; Physics ; Spectroscopy |
| 语种 | 英语 |
| WOS记录号 | WOS:A1996UA61400008 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/12647]  |
| 专题 | 中国科学院武汉物理与数学研究所 |
| 作者单位 | CHINESE ACAD SCI,WUHAN INST PHYS,LAB MAGNET RESONANCE & ATOM & MOL PHYS,WUHAN 430071,PEOPLES R CHINA |
| 推荐引用方式 GB/T 7714 | Ye, CH,Hu, JZ,Zhou, JY,et al. High resolution H-1 spectra of powdered solids observed by Hahn echo pulse sequence with magic-angle spinning[J]. SOLID STATE NUCLEAR MAGNETIC RESONANCE,1996,6(1):85-94. |
| APA | Ye, CH.,Hu, JZ.,Zhou, JY.,Deng, F.,Feng, HQ.,...&Li, LY.(1996).High resolution H-1 spectra of powdered solids observed by Hahn echo pulse sequence with magic-angle spinning.SOLID STATE NUCLEAR MAGNETIC RESONANCE,6(1),85-94. |
| MLA | Ye, CH,et al."High resolution H-1 spectra of powdered solids observed by Hahn echo pulse sequence with magic-angle spinning".SOLID STATE NUCLEAR MAGNETIC RESONANCE 6.1(1996):85-94. |
入库方式： OAI收割
来源：武汉物理与数学研究所
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