Fast Beam Photodissociation Studies of Polyatomic Free Radicals

多原子自由基的快束光解离研究

• 批准号: 8803729
• 负责人: Daniel Neumark
• 金额: $ 27.92万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-07-01 至 1991-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8803729&HistoricalAwards=false
• 关键词: Fast; Beam; Photodissociation; Studies; Polyatomic

This research, part of the Experimental Physical Chemistry Program, will study the spectroscopy and photodissociation dynamics of dissociative electronic states of polyatomic free radicals. This study will elucidate the reactivity and photochemistry of the prototypical species studied. Initial studies will focus on small well characterized radicals such as triatomic species containing carbon, nitrogen and/or oxygen. The knowledge gained in these studies will be utilized in the study of more complex species, including organometallic radicals containing one or more coordinatively unsaturated transition metal atom. A fast mass-selected beam of internally cold radicals is generated by negative ion photodetachment, and the fragments produced by photodissociating the radicals are detected. The energy dependence of the photodissocation cross section will be determined for each radical, followed by photodissociation dynamics studies at selected excitation energies in which photofragment energy and angular distribution are measured.

这项研究是实验物理化学的一部分， 程序，将研究光谱学和光解离 多原子自由电子解离态动力学 根的 这项研究将阐明反应性和 研究的典型物种的光化学。 初步研究将集中在小的良好表征的自由基 例如含有碳、氮和/或 氧气 将利用这些研究中获得的知识 在研究更复杂的物种，包括有机金属 含有一个或多个配位不饱和的基团 过渡金属原子。 一个快速的质量选择光束， 通过负离子光剥离产生冷自由基，并且 通过光离解自由基产生的碎片 检测到 光解离交叉的能量依赖性 部分将确定为每个激进，其次是 选择激发光解离动力学研究 其中光碎片能量和角分布 都是经过测量的。