Introduction of Laser Photolysis - Transient Spectroscopy Experiments in a Physical Chemistry Lab

本课题的目的是在本科物理化学实验室中引入激光光解实验。实验课程的学生代表了大量未被充分代表的群体，他们被强烈鼓励从事科学和技术方面的职业。新实验室是目前动力学测量实验方法的简化版本。同时，它保留了现代化学动力学的所有主要特征。新实验室的主要教学目标是：(1)使学生熟悉研究快速化学反应的一种现代方法——激光光解结合瞬态光谱法；(2)使学生熟悉基本反应的孤立性和伪一阶条件的概念；(3)阐明大气中臭氧形成和碳氢化合物氧化的动力学和机理。每学年在物理化学实验室的四个班（每班18人）布置新的实验。几位教师正在评估这个本科生实验的有效性，并在必要时对实验进行修改，使其符合现有课程的逻辑。此外，该实验室还被用于本科生在夏季和常规学期进行的卤素取代自由基氧化动力学研究。

The objective of this project is to introduce a laser photolysis experiment in the undergraduate physical chemistry laboratory. The students in the laboratory course represent a significant number of underrepresented groups who are being strongly encouraged to pursue careers in science and technology. The new laboratory is a simplified version of the current experimental methods in kinetic measurements. At the same time, it conserves all the main features of modern chemical kinetics. The main teaching objectives of the new laboratory are (1) to make students familiar with one of the modern approaches of studying fast chemical reactions laser photolysis combined with a transient spectroscopy; (2) to familiarize students with the concept of isolation of an elementary reaction and the pseudo-first-order conditions; and (3) to demonstrate the kinetics and mechanism of ozone formation and hydrocarbon oxidation in the atmosphere. The new experiment is assigned to students in the four sections (18/section) of physical chemistry laboratory each academic year. Several faculty are evaluating the effectiveness of this experiment for undergraduates and working to modify the experiment when necessary to fit logically into the existing program. In addition, the laboratory is being used in research on kinetics of oxidation of halogen substituted radicals conducted by undergraduate students during summer and regular semesters.