Pyrolysis Jet Spectroscopy and Dynamics of Transient Species

Clouthier博士得到了实验物理化学计划的资助，用于研究在膨胀的射流中高温分解产生的瞬时小分子和自由基的高分辨率光谱。这项工作的结果直接影响到许多应用研究和工程领域，包括半导体工业中使用的能源转换、燃料利用、煤气化和化学气相沉积技术。克劳蒂埃博士开发了一种他称之为热解喷射光谱学的新技术，在这种技术中，携带在高压惰性气体中的前体分子在通过喷嘴膨胀进入真空室之前被热解。短接触时间和膨胀冷却允许观察到即使是非常短的寿命和活性物种的旋转冷光谱。他计划将这项新技术应用于几个瞬时物种的研究，包括：二氯卡宾、甲酰氰化物、硫代乙醛、硫代丙酮、硒甲醛，以及一系列被认为是半导体工业使用的化学气相沉积过程中的重要中间体的烷基金属化合物。

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.