The Spectroscopy of Chemical Intermediates and Other Transient Species

化学中间体和其他瞬态物质的光谱学

• 批准号: 9005963
• 负责人: Terry Miller
• 金额: $ 59.96万
• 依托单位: Ohio State University Research Foundation -DO NOT USE
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-07-01 至 1994-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9005963&HistoricalAwards=false
• 关键词: Spectroscopy; Chemical; Intermediates; Other; Transient

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.

米勒教授得到了实验物理化学计划的支持，以研究各种瞬时化学物种的光谱。 这种化学中间体等反应性原子，自由基和分子离子通常在反应中在燃烧，溶剂化，合成过程和大气化学中起关键作用。 光谱识别和表征对于监测这些中间体以及理解它们的结构和相互作用很重要。 这项工作使用了在先前的NSF支持下构建的两个设施。 一种专门研究离子簇的设施，使用激光诱导的荧光来探测簇结构和飞行时间质谱，以确定原子数量。 第二个设备在脉冲超音速射流中制备中性自由基，用于超高分辨率的脉冲激光光谱法，旨在揭示旋转结构的细节。 研究的物种范围从小型多原子学到多环芳香自由基，包括含有离子或开放式自由基的簇。