NMR Determination of Electron Spin Level Structure of S>1/2 Transition Metal Ions

S 电子自旋能级结构的核磁共振测定

• 批准号: 0209616
• 负责人: Robert Sharp
• 金额: $ 38.11万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-08-15 至 2006-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0209616&HistoricalAwards=false
• 关键词: NMR; Determination; Electron; Spin; Level

In this project, funded by the Experimental Physical Chemistry Program of the Chemistry Division, Sharp will develop techniques to measure electron spin-related properties of transition metal ions with total spin greater than one. The electron spin physics will be probed indirectly by NMR spectroscopy. New methods of orienting paramagnetic molecules in flow-stretched hydrogels will be developed. Proof of concept experiments will be performed on paramagnetic complexes with spin S = 1, 3/2 and 5/2 and used to test the underlying theory. Biological and biochemical systems often contain ions that are characterized by electron spin. The total electron spin of these units plays an important role in the behavior of these systems. While the theory for systems with just one unbalanced electron spin is well developed, this is usually not the case when transition metal ions are present. The goals of the present project are to perform proof of concept experiments and thereby aid in the development of a satisfactory theory. Students will participate in this research. They will gain experience in one of the forefront areas of contemporary physical chemistry and thereby prepare them for entry into the scientific/technological workforce.

在这个项目中，由化学划分的实验物理化学计划资助，Sharp将开发技术以测量过渡金属离子的电子自旋相关特性，总自旋大于1。电子自旋物理学将通过NMR光谱间接探测。将开发出定向流磁分子的新方法。概念验证实验将对具有旋转S = 1、3/2和5/2的顺磁复合物进行，并用于测试基础理论。生物学和生化系统通常包含以电子自旋为特征的离子。这些单元的总电子自旋在这些系统的行为中起着重要作用。虽然只有一种不平衡电子自旋的系统的理论发达了，但在存在过渡金属离子时通常并非如此。本项目的目标是执行概念证明实验，从而有助于发展令人满意的理论。 学生将参加这项研究。他们将在当代物理化学的最前沿之一中获得经验，从而准备进入科学/技术劳动力。