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.

米勒教授在实验物理化学计划的支持下研究各种瞬态化学物质的光谱。 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以及了解它们的结构和相互作用都很重要。 这项工作使用了在 NSF 先前支持下建造的两个设施。 一座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法来确定原子数量。 第二台设备在脉冲超音速射流中制备中性自由基，用于超高分辨率脉冲激光光谱，旨在揭示旋转结构的细节。 正在研究的物种范围从小型多原子到多环芳族自由基，包括含有离子或开壳自由基的簇。