Energy and Product Partitioning in Chemicals Excited by Light

光激发化学品中的能量和产物分配

• 批准号: 9120931
• 负责人: Peter Wagner
• 金额: $ 44.24万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-01-01 至 1996-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9120931&HistoricalAwards=false
• 关键词: Energy; Product; Partitioning; Chemicals; Excited

A thorough investigation of the geometric parameters which govern the interaction of one part of a molecule with another part of the same molecule will be conducted. The interactions to be investigated will include processes which result in energy transfer and/or chemical reaction. The base absorbing chromophore to be investigated will be an aromatic ketone. By careful choice of geometry in the aromatic ketone, it will be possible to define for the first time the restrictions imposed by atomic and electronic orientation on chemical processes of excited aryl ketones. The projects to be investigated will include: (1) measurement of the kinetics of processes involving triplet cycloaddition, hydrogen abstraction and intramolecular triplet energy transfer; (2) observation of biradical partitioning; and (3) determination of the spin multiplicity of benzene-halogen cleavage reactions. Classical photochemical and photophysical methods will be utilized throughout the project to provide a thorough examination of the mechanisms involved. %%% This grant from the Organic Dynamics Program supports the continuing work of Professor Peter J. Wagner at Michigan State University. The investigation will be aimed at probing the means by which energy is transferred from one part of a molecule to another. This work is particularly important since the process of how two parts of the same molecule interact is at the heart of many chemical processes which occur in both natural and synthetic molecules. The work to be conducted will provide the chemist, as well as other scientists, with a basic understanding of how chemical processes occur upon absorption of a photon of light. From this project will emerge a fundamental understanding of the constraints placed upon light induced processes by geometrical configurations of the groups comprising photoreactive molecules.

对几何参数进行了深入的研究， 控制着分子的一部分与另一部分的相互作用 将传导相同分子的一部分。的相互作用 将包括导致 能量传递和/或化学反应。基地吸收 待研究的发色团将是芳族酮。通过 仔细选择芳香酮的几何形状， 第一次有可能定义所施加的限制 通过原子和电子的取向， 受激芳基酮。拟调查的项目将 包括：（1）测量过程的动力学， 三重环加成、夺氢和分子内 三重态能量转移;（2）双自由基的观察 （3）确定自旋多重性 苯-卤素裂解反应。经典的光化学和 在整个项目中将使用地球物理方法 对所涉机制进行彻底审查。 %%% 有机动力学计划的这笔赠款支持 密歇根州立大学的彼得·J·瓦格纳教授继续研究 大学调查的目的是调查 能量从一个物体的一部分转移到另一个物体的一部分的装置。 分子到另一个。这项工作特别重要，因为 同一分子的两部分如何相互作用的过程 在许多化学过程的核心， 天然和合成分子。将开展的工作将 为化学家和其他科学家提供了一个基本的 了解化学过程如何发生在吸收 一个光子。从这个项目中将出现一个 对光的限制的基本理解 群的几何构型诱导过程 包括光反应分子。