Measuring 13C-170 and 13C-14N Distances in Solids; NMR Technique Development

测量固体中的 13C-170 和 13C-14N 距离；

• 批准号: 9603624
• 负责人: Terry Gullion
• 金额: --
• 依托单位: Florida State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-03-01 至 2000-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9603624&HistoricalAwards=false
• 关键词: Measuring; 13C; 170; 14N; Distances

In this project supported by the Experimental Physical Chemistry Program of the Chemistry Division, Gullion will develop a high-resolution magic-angle spinning NMR technique which allows measurement of internuclear distances between dipolar and quadrupolar nuclei. Specifically tailored pulse trains synchronized with the sample rotation will recouple the dipolar interactions between the desired spin pairs, providing structural information of complex solids in a straightforward manner. The first applications will be to the interactions between bound water and cellulose as well as to a polymer blend of cellulose with polyacrylonitrile. These experiments will fill a void in MAS NMR distance-measuring techniques. Solid-state NMR techniques similar to those being developed in this work have been applied to a number of interesting chemical systems, including biological solids, zeolites, and polymers. As such, they demonstrate the importance and wide applicability of these structural techniques to such diverse areas as materials science, structural biology, and the study of catalytic systems.

在该项目由化学划分的实验物理化学计划支持的项目中，Gullion将开发高分辨率的魔法旋转NMR技术，该技术允许测量偶极和四极核之间的核切间距离。 特异性定制的与样品旋转同步的脉冲序列将使所需的旋转对之间的偶极相互作用恢复，从而以简单的方式提供复杂固体的结构信息。 最初的应用将是结合水与纤维素之间的相互作用，以及纤维素与聚丙烯硝基烯的聚合物混合物之间的相互作用。 这些实验将填充MAS NMR距离测量技术中的空隙。 与这项工作相似的固态NMR技术已应用于许多有趣的化学系统，包括生物固体，沸石和聚合物。 因此，它们证明了这些结构技术对材料科学，结构生物学和催化系统研究等不同领域的重要性和广泛的适用性。