Pyrolysis Jet Spectroscopy and Dynamics of Transient Species

克劳塞尔博士得到了实验物理化学计划的资助，研究在膨胀射流中高温分解产生的小瞬态分子和自由基的高分辨率光谱。这项工作的结果对许多应用研究和工程领域有直接的影响，包括能量转换、燃料利用、煤炭气化和半导体工业中使用的化学气相沉积技术。克劳塞尔博士开发了一种新技术，他称之为热解喷射光谱，在这种技术中，前体分子被高压惰性气体包围，在通过喷嘴进入真空室膨胀之前被热解。短的接触时间和膨胀冷却允许观察到甚至非常短的和反应性的物质的旋转冷光谱。他计划将这项新技术应用于几种瞬态物质的研究，包括：二氯苯、甲酰氰、硫乙醛、硫丙酮、硒甲醛和一系列烷基金属化合物，这些化合物被认为是半导体工业使用的化学气相沉积过程中重要的中间体。

Dr. Clouthier is supported by a grant from The Experimental Physical Chemistry Program to study the high resolution spectra of small transient molecules and free radicals produced through high temperature decomposition in an expanding jet. The results of this work have a direct impact on many areas of applied research and engineering including energy conversion, fuel utilization, coal gasification, and chemical vapor deposition techniques used in the semiconductor industry. Dr. Clouthier has developed a new technique which he calls pyrolysis jet spectroscopy, in which precursor molecules, entrained in a high pressure stream of inert gas, are pyrolyzed just prior to expansion through a nozzle into a vacuum chamber. The short contact time and expansion cooling allow the observation of the rotationally cold spectra of even very short-lived and reactive species. He plans to apply this new technique to the study of several transient species including: dichlorocarbene, formyl cyanide, thioacetaldehyde, thioacetone, selenoformaldehyde, and a series of alkyl metal compounds thought to be important intermediates in the chemical vapor deposition process used by semiconductor industries.