Combined Infrared and EPR Studies of Photochemically Generated Free Radicals in Low-Temperature Solids

低温固体中光化学产生的自由基的红外和 EPR 联合研究

• 批准号: 9526277
• 负责人: Charles Wight
• 金额: $ 5.24万
• 依托单位: University of Utah
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-08-15 至 1999-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9526277&HistoricalAwards=false
• 关键词: Combined; Infrared; EPR; Studies; Photochemically

In this project jointly funded by the Division of International Programs and the Experimental Physical Chemistry Program of the Chemistry Division, Professor Charles Wight of the University of Utah will collaborate with E. Y. Misochko of the Institute of Chemical Physics in Chernogolovka, Russia. In this program Fourier Transform infrared (FTIR) and electron paramagnetic resonance (EPR) spectroscopies will be used to study photochemical reactions of F and H atoms with simple molecules in low-temperature matrices. The expertise of the investigators is complementary, with Wight responsible for the FTIR experiments and Misochko for the EPR. Through this collaboration these researchers will be able to formulate a comprehensive description of hot atom mobility, diffusion of thermalized atoms, and atom-molecule reactions that occur in the restrictive environment of low-temperature solids. Thin layers of solid `noble gas` matrices at very low-temperatures are an ideal vehicle for containing highly reactive or transient chemical species so that they can be studied using a technique called matrix isolation spectroscopy. Using this technique the mechanisms by which a number of chemical transformations occur can be unravelled and examined. Examples of such reactions are polymerization, explosive decomposition, and combustion. Through this international collaboration, the complementary resources of a Russian and an American investigator will be combined to produce a more complete picture of these types of processes than might be obtained by either scientist working alone.

在这个由国际项目部和化学项目部实验物理化学项目共同资助的项目中，犹他大学的Charles Wight教授将与俄罗斯切尔诺戈洛夫卡化学物理研究所的E. Y. Misochko合作。在这个程序中，傅里叶变换红外（FTIR）和电子顺磁共振（EPR）光谱将用于研究F和H原子与简单分子在低温基质中的光化学反应。研究人员的专业知识是互补的，怀特负责FTIR实验，米索科负责EPR。通过这次合作，这些研究人员将能够对在低温固体的限制性环境中发生的热原子迁移率、热化原子的扩散和原子-分子反应进行全面的描述。在极低温度下，固体“稀有气体”基质的薄层是包含高活性或瞬态化学物质的理想载体，因此可以使用称为基质分离光谱的技术对它们进行研究。利用这种技术，许多化学转变发生的机制可以被揭示和检验。这类反应的例子有聚合、爆炸分解和燃烧。通过这种国际合作，一名俄罗斯研究者和一名美国研究者的互补资源将结合起来，对这类过程产生比任何一名科学家单独工作所能获得的更全面的了解。