The Shape of Intermolecular Forces from Spin Relaxation Times

自旋弛豫时间的分子间力的形状

• 批准号: 8901426
• 负责人: John Morrison
• 金额: $ 22.25万
• 依托单位: University of Illinois at Chicago
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-05-01 至 1992-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8901426&HistoricalAwards=false
• 关键词: Shape; Intermolecular; Forces; Spin; Relaxation

This research, supported by the Experimental Physical Chemistry program, uses nuclear magnetic resonance techniques to obtain experimental information on the angle-dependent interaction between molecules by making measurements of nuclear spin relaxation times in dilute mixtures of gases. These measurements will provide directly the cross sections for transfer of rotational angular momentum. The molecules to be studied are important constituents in the atmosphere, the interstellar medium, flame systems and infrared lasers. In addition to the gas phase studies, changes in chemical shifts and the relaxation times due to collisions with paramagnetic species will be studied. Platinum atoms and paramagnetic transition metal complexes on solid supports will provide the paramagnetic centers. Nuclear magnetic resonance studies of mobile species on zeolites and other classes of molecular sieves will also be attempted.

本研究由实验物理化学 程序，使用核磁共振技术获得 角相关相互作用的实验信息 通过测量原子核的自旋 稀释混合气体中的弛豫时间。这些 测量将直接提供横截面， 转动角动量的转移。这些分子 研究的是大气中的重要成分， 星际介质、火焰系统和红外激光器。 除了气相研究，化学变化 位移和弛豫时间由于碰撞 将研究顺磁性物质。铂原子和 在固体载体上的顺磁性过渡金属络合物将 提供顺磁中心。核磁共振 沸石和其它类型的沸石上的移动的物种的研究 也将尝试使用分子筛。