物理化学学报 >> 1997, Vol. 13 >> Issue (01): 16-19.doi: 10.3866/PKU.WHXB19970104

研究论文 上一篇    下一篇

研究塑性有机固体的1H NMR方法

胡建治,毛胜华,冯汉桥,周进元,邓风,杨年华,李丽云,叶朝辉   

  1. 中国科学院武汉物理所 波谱与原子分子国家重点实验室,武汉 430071
  • 收稿日期:1996-07-31 修回日期:1996-09-13 发布日期:1997-01-15
  • 通讯作者: 叶朝辉

1H NMR Studies of Plastic Organic Solids

Hu Jian-Zhi,Mao Sheng-Hua,Feng Han-Qiao,Zhou Jin-Yuan,Deng Feng,Yang Nian-Hua,Li Li-Yun,Ye Chao-Hui   

  1. State Key Laboratory of Magnetic Resonance nd Atomic and Molecular Physics,Wuhan Institute of Physics,The Chinese Academy of Sciences,Wuhan 430071
  • Received:1996-07-31 Revised:1996-09-13 Published:1997-01-15
  • Contact: Ye Chao-Hui

摘要:

塑性有机固体的1H MAS NMR谱通常由一高分辨谱与一宽城谱组成,其中高分辨谱分量对应于塑性相,而宽线谱分量对应于刚性相.长延迟回波-MAS NMR实验可测得塑性相的高分辨谱,CRAMPS方法可测得整个固体1H体系的高分辨谱,常温下它往往以刚性相的贡献为主要成分.实验结果表明,结合1H MAS、回波-MAS与CRAMPS等三种固态高分辨1H NMR技术可望成为深入研究塑性有机固体中塑性相与刚性相的比例,分子结构及运动状态的有效方法.

关键词: 固态1H NMR, 有机塑性固体, MAS, 回波-MAS, CRAMPS

Abstract:

The 1H MAS spectrum of a plastic organic solid is usually composed of a high-resolution component and a broadline component. The high-resolution component corresponds to a plastic phase, while the broadline component corresponds to the rigid Phase. The high-resolution spectrum of the plastic phase can be observed by the echo-MAS experiment with a long echo time; the high-resolution spectrum of the whole 1H system can be observed by the CRAMPS technique, mainly coming from the contribution of the rigid phase at usual temperature. It is shown that combination of CRAMPS with 1H MAS and echo-MAS is an effective way for studying the ratio of the plastic phase to the rigid phase, molecular structure and states of motion in organic solids.

Key words: Solid-state 1H NMR, Plastic organic solid, MAS, Echo-MAS, CRAMPS