Dynamics of Photodissociation of Polyatomic Molecules

多原子分子光解动力学

• 批准号: 9220278
• 负责人: James Kinsey
• 金额: --
• 依托单位: William Marsh Rice University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-02-15 至 1996-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9220278&HistoricalAwards=false
• 关键词: Dynamics; Photodissociation; Polyatomic; Molecules

In this project in the Experimental Physical Chemistry Program of the Chemistry Division, James Kinsey of Rice University will develop new picosecond laser techniques for studying reaction dynamics of excited electronic states. Particular attention will be paid to the Raman excitation profile, which arises from the small fraction of excited molecules which emit photons at some point during their decomposition. Theoretical analyses of these profiles provides a unique source of information about the earliest stages of photodecomposition. %%% Photochemical decompositions are among the most fundamental and important of chemical processes. For example, a detailed elucidation of how sunlight leads to ozone decomposition is essential if we hope to alter the environmental consequences of ozone layer depletion. The early stages of such photochemical reactions are very hard to study in the laboratory since they are over in less time than light takes to travel 0.001 inches. Prof. Kinsey's studies of photochemical decomposition of ozone and other molecules will provide powerful new tools for gaining insight into reactions on this ultrafast timescale.

赖斯大学的James Kinsey将在化学学部的实验物理化学项目中开发新的皮秒激光技术，用于研究激发态的反应动力学。我们将特别注意拉曼激发谱，它是由一小部分受激分子在分解过程中的某一点发射光子引起的。对这些剖面的理论分析提供了关于光分解最早阶段的独特信息来源。光化学分解是最基本和最重要的化学过程之一。例如，如果我们希望改变臭氧层消耗的环境后果，详细阐明阳光如何导致臭氧分解是必不可少的。这种光化学反应的早期阶段很难在实验室里进行研究，因为它们结束的时间比光传播0.001英寸的时间还短。金赛教授对臭氧和其他分子的光化学分解的研究将为深入了解这种超快时间尺度上的反应提供强大的新工具。