Electron Scattering Studies of Temporary Anion Formation in Hydrocarbons

在这个实验物理化学项目中， 的化学部，伯罗和约旦（在 内布拉斯加大学和匹兹堡大学，分别）将 继续进行联合实验和理论研究， 一些碳氢化合物的低能电子散射。 两个机构的实验研究将检查 振动激发和角分布 用光电子能谱法定位暂时阴离子 共振（Resonance） 乔丹会计算出 共振在匹兹堡，第一次使用乙烯和丙烯作为 模型系统，然后将这些结果应用于甲基和 氯乙烷 %%% 一种可视化分子结构的强大手段， 化学反应性由被占据的概念提供， 未被占据的电子态，也被称为轨道。 光电子能谱学长期以来提供了一种方法， 研究占据轨道，但直到最近， 通常未占据轨道的相应数据已被 稀少。 这项工作旨在收集这些数据，从而帮助 来回答关于结构和键合的关键化学问题， 复杂分子 它还提供了关键的数据模型， 电子转移，这是一个大的 许多化学过程，如光合作用。

In this project in the Experimental Physical Chemistry Program of the Chemistry Division, Burrow and Jordan (at the Universities of Nebraska and Pittsburgh, respectively) will continue joint experimental and theoretical studies of low-energy electron scattering from a number of hydrocarbons. Experimental studies at both institutions will examine vibrational excitation and angular distributions using photoelectron spectroscopy to locate temporary anion states (resonances). Jordan will calculate the location of resonances at Pittsburgh, first using ethylene and propene as model systems, and then applying those results to methyl and ethyl chloride. %%% A powerful means of visualizing molecular structure and chemical reactivity is provided by the concept of occupied and unoccupied electron states, which are also known as orbitals. Photoelectron spectroscopy has long provided a means of studying occupied orbitals, but until recently the corresponding data for normally unoccupied orbitals has been scarce. This work aims at gathering such data, thereby helping to answer key chemical questions on structure and bonding in complex molecules. It also offers data crucial to models of electron transfer, which is the mechanism involved in a large number of chemical processes such as photosynthesis.