Photoreactivity of Atmospheric Radicals and Complexes: Time Resolved Fourier Transform Spectroscopy

大气自由基和络合物的光反应性：时间分辨傅立叶变换光谱

• 批准号: 9528008
• 负责人: Veronica Vaida
• 金额: $ 47.12万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-04-01 至 1999-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9528008&HistoricalAwards=false
• 关键词: Photoreactivity; Atmospheric; Radicals; Complexes; Time

The Experimental Physical Chemistry Program is supporting Prof. Veronica Vaida of the University of Colorado at Boulder to develop an ultraviolet time-resolved fourier-transform spectrometer (TRFTS). She will investigate three systems: a) photofragmentation of radicals of atmospheric importance, such as the chlorine dioxide, chlorine nitrate and nitrate radicals, b) vibrational quenching rates of various oxygen-containing radicals with oxygen, nitrogen or argon, and c) photoreactivity of complexes, in which TRFTS will be used to monitor changes in the products, quantum yields, and photofragment internal energies when ozone-, sulfur dioxide- or chlorine dioxide-water complexes are photolysed. The experimental technique as developed and exploited in this endeavor will combine time resolved fourier transform spectroscopy with ultraviolet absorption detection of photoproducts. Light initiated chemical reactions are prevalent in the atmosphere. These studies will address fundamental questions about reactivity of radicals and their complexes, with the quantitative rigor necessary for inclusion of such reactions in atmospheric models.

实验物理化学计划正在支持科罗拉多大学博尔德分校的Veronica Vaida教授开发一种紫外线时间分辨傅里叶变换光谱仪(TRFTS)。她将研究三个系统：a)对大气有重要意义的自由基，如二氧化氯、硝酸氯和硝酸根，b)各种含氧自由基与氧、氮或氩的振动猝灭速率，以及c)络合物的光反应性，其中TRFTS将用于监测臭氧、二氧化硫或二氧化氯-水络合物光解时产物、量子产率和光碎片内能的变化。这项工作中开发和开发的实验技术将把时间分辨傅里叶变换光谱与光产物的紫外吸收检测结合起来。光引发的化学反应在大气中很普遍。这些研究将解决有关自由基及其络合物的反应性的基本问题，以及将此类反应纳入大气模型所需的定量严格性。