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

本项目的目的是介绍本科生物理化学实验室的激光光解实验。实验室课程的学生代表了相当数量的代表性不足的群体，他们被强烈鼓励在科学和技术领域追求职业生涯。新的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现代方法之一，激光光解与瞬变光谱相结合；(2)使学生熟悉基元反应分离的概念和准一级条件；(3)演示大气中臭氧形成和碳氢化合物氧化的动力学和机理。新实验每学年分配给物理化学实验室四个部分(18个部分)的学生。一些教师正在评估这项实验对本科生的有效性，并在必要时对实验进行修改，以符合现有计划的逻辑。此外，该实验室还用于本科生在暑期和正常学期进行的卤素取代自由基氧化动力学的研究。

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.