Molecular Relaxation by ESR Spectroscopy and Related Phenomena

ESR 光谱的分子弛豫及相关现象

• 批准号: 9004552
• 负责人: Jack Freed
• 金额: --
• 依托单位: Cornell University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-07-01 至 1994-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9004552&HistoricalAwards=false
• 关键词: Molecular; Relaxation; ESR; Spectroscopy; Related

Dr. Jack H. Freed is supported by a grant from the Experimental Physical Chemistry Program to study molecular relaxation by electron spin resonance (ESR) spectroscopy. These studies provide valuable insight into the mechanisms of molecular motion and also into the rapidly emerging medical area of magnetic imaging of the human body. A variety of newly developed ESR relaxation techniques are to be employed, and the necessary theoretical frameworks for understanding these experiments are also to be developed and extended. Specific projects include the following: (1) the further applications of the new two-dimensional Fourier-Transform electron-electron double resonance (2D-ELDOR) technique to the study of rotational molecular dynamics in liquids; (2) the extension of 2D-ELDOR to the slow motional regime; (3) the application of field-swept 2D-electron spin echo techniques and slow-motional 2D-ELDOR to the study of viscous liquids and glasses; (4) studies of molecular dynamics on surfaces by 2D-ESR methods; (5) comparisons of microscopic vs. macroscopic diffusion in complex liquids utilizing the method of dynamic imaging of diffusion (DID) - ESR for measurement of macroscopic translational diffusion and 2D-ELDOR for microscopic translational diffusion; (6) applications of far-infrared ESR to the study of molecular dynamics.

杰克·H·弗里德博士得到了实验物理化学计划的资助，通过电子自旋共振(ESR)光谱学研究分子弛豫。这些研究提供了对分子运动机制的有价值的见解，也为迅速崛起的人体磁成像医学领域提供了有价值的见解。将采用各种新开发的ESR弛豫技术，并将开发和扩展理解这些实验所需的理论框架。具体项目包括：(1)新的二维傅立叶变换电子-电子双共振(2D-Eldor)技术在液体转动分子动力学研究中的进一步应用：(2)将2D-Eldor技术推广到慢运动区；(3)场扫描2D电子自旋回波技术和慢运动2D-Eldor技术在粘性液体和玻璃研究中的应用：(4)用2D-ESR方法研究表面分子动力学；(5)利用扩散动态成像(DID)-ESR测量宏观平移扩散和2D-Eldor测量微观平移扩散的方法比较复杂液体中的微观和宏观扩散；(6)远红外ESR在分子动力学研究中的应用。