Internal Redistribution of Energy in Chemicals Excited by Light

有机和高分子化学的这项资助提供了 支持密歇根州立大学Peter瓦格纳博士的研究 大学这项工作的重点是光化学机制， 各种有机化合物。这些研究旨在 阐明有机物之间相互作用的细节 分子和光。他们的理解对于一个 化学和生物过程的数量。 一个分子的两个离散部分之间的化学相互作用 分子是大多数现代合成有机物的核心 反应. 许多这样的反应都是由 光的吸收。 几种这样的光诱导反应是 这项工作的主要内容。 利用光来促进 一个分子内的反应不仅允许一些新的 反应，否则不会发生，但也提供了 对分子如何改变形状和进入 各种化学反应所需的几何形状。因为 光激发分子的反应速度和 分子通过它改变形状， 竞争的发生不能用热测量 化学. 将研究几个系统，其中 一个分子中两种反应组分的取向可 可以改变，以便这种取向对特定的 可以评估反应。 要研究的反应包括 激发能的转移;电子转移，有时 然后进行化学键合，形成新的产物; 氢原子转移，随后形成新的产物; 和卤素原子的裂解以产生聚合 发起人

This grant in Organic and Macromolecular Chemistry provides support for the research of Dr. Peter Wagner, Michigan State University. The work is focused on photochemical mechanisms of a variety of organic compounds. These studies are designed to elucidate the details of the interactions between organic molecules and light. Their understanding is important for a number of chemical and biological processes. Chemical interactions between two discrete parts of one molecule are at the core of most modern synthetic organic reactions. Many such reactions are initiated uniquely by the absorption of light. Several such light-induced reactions are the main subject of this work. The use of light to promote reactions within one molecule not only allows some new reactions that could not otherwise occur, but also provides unique insight into how molecules change shape and into the geometries required for various chemical reactions. Because the reactions of light-excited molecules are as fast as the motions by which molecules change their shapes, altogether new competitions occur that cannot be measured in thermal chemistry. Several systems will be studied in which the orientation of the two reactive components in one molecule can be varied so that the effect of such orientation on specific reactions can be assessed. The reactions to be studied include transfer of excitation energy; electron transfer, sometimes followed by chemical bonding and novel product formation; hydrogen atom transfer, followed by novel product formation; and cleavage of halogen atoms to produce polymerization initiators.