The Spectroscopy of Chemical Intermediates and Other Transient Species

米勒教授得到了实验物理化学计划的支持，该计划研究各种瞬时化学物种的光谱。活性原子、自由基和分子离子等化学中间体通常在燃烧、溶剂化、合成过程和大气化学等反应中发挥关键作用。光谱鉴定和表征对于监测这些中间体和了解它们的结构和相互作用都很重要。在这项工作中使用了在先前NSF支持下建造的两个设施。其中一个致力于研究离子团簇的设施，使用激光诱导荧光来探测团簇结构，并使用飞行时间质谱仪来确定原子的数量。第二个装置在脉冲超音速射流中准备中性基团，用于超高分辨率脉冲激光光谱分析，旨在揭示旋转结构的细节。所研究的物种范围从小的多原子体到多环芳香族自由基，包括含有离子或开壳自由基的簇合物。

Professor Miller is supported by the Experimental Physical Chemistry Program to investigate the spectroscopy of various transient chemical species. Such chemical intermediates as reactive atoms, free radicals, and molecular ions often play critical roles in reactions in combustion, solvation, synthetic processes, and the chemistry of the atmosphere. Spectroscopic identification and characterization is important both for monitoring these intermediates and for understanding their structures and interactions. Two facilities constructed under prior NSF support are used in this work. One facility, dedicated to the study of ionic clusters, uses laser-induced fluorescence to probe cluster structure and time-of-flight mass spectrometry to determine the number of atoms. The second apparatus prepares neutral radicals in a pulsed supersonic jet for ultra-high resolution pulsed laser spectroscopy designed to reveal details of rotational structure. Species under investigation range from small polyatomics to multi-ring aromatic radicals and include clusters containing ions or open-shell radicals.