Dynamics of Photodissociation of Polyatomic Molecules

多原子分子光解动力学

• 批准号: 9528248
• 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: 1996
• 资助国家: 美国
• 起止时间: 1996-03-01 至 2000-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9528248&HistoricalAwards=false
• 关键词: Dynamics; Photodissociation; Polyatomic; Molecules

In this project in the Experimental Physical Chemistry Program of the Chemistry Division, Kinsey will study the dynamics of molecular photodissociation both experimentally and theoretically. In the experimental studies Dissociative Resonance Raman Spectroscopy (DRRS) will be used to probe transient processes involved in the photochemical decomposition of small molecules by detecting the weak emissions from vibrationally excited states. Light from many vibrational levels will be accumulated using a newly constructed instrument in order to obtain a complete description of the dissociation. Mathematical functions called wavelets will be employed to model photodissociation processes efficiently. Theoretical studies will aid in interpreting the experimental Raman data, which will be inverted mathematically to determine the potential energy surface directly. 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 difficult 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 will provide powerful new tools for gaining insight into reactions which occur on such a fast timescale.

在这个项目中，在实验物理化学计划的 化学部，金赛将研究分子动力学 实验和理论上的光解离。 在 实验研究解离共振拉曼光谱（DRRS） 将用于探测光化学过程中涉及的瞬态过程， 通过检测小分子的微弱发射， 振动激发态 来自许多振动层次的光将 使用新建造的仪器积累，以获得 完整描述了解离过程 数学函数调用 小波将被用来模拟光解离过程 有效地 理论研究将有助于解释 实验拉曼数据，这将是数学反演， 直接确定势能面。 光化学分解是最基本和最重要的 的化学过程。 例如，详细说明如何 阳光导致臭氧分解是必不可少的，如果我们希望改变 臭氧层消耗的环境后果。 早期 这种光化学反应的各个阶段很难在 实验室，因为他们在更短的时间比光需要旅行 0.001英寸。 金赛教授对光化学分解的研究将 提供了强大的新工具，用于深入了解发生的反应 在这么短的时间内。