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

实验物理化学计划是支持教授维罗妮卡 位于博尔德的科罗拉多大学的Vaida开发了一种紫外线 时间分辨傅里叶变换光谱仪（TRFTS）。 她将 研究三个系统：a）光致断裂自由基的 大气的重要性，如二氧化氯，硝酸氯 和硝酸根，B）各种振动猝灭速率 含氧基团与氧、氮或氩，和c） 复合物的光反应性，其中TRFTS将用于监测 产物、量子产率和光碎片内部的变化 臭氧、二氧化硫或二氧化氯与水复合时产生的能量 被光解。 开发和利用的实验技术 在此奋进中，将结合联合收割机时间分辨傅立叶变换 光谱学与光产物的紫外吸收检测。 光引发的化学反应在大气中很普遍。 这些研究将解决有关反应性的基本问题， 自由基及其复合物，具有必要的定量严谨性， 将这些反应纳入大气模型。

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.