Investigating Phase-Dependent Reactivity in Environmental Chemistry

华盛顿大学的Philip Reid教授由实验物理化学计划资助，对溶剂对与环境相关的化学反应的影响进行实验研究。 卤素氧化物光化学在大气中很重要;虽然气相光反应性已在实验室中得到很好的研究，但对这些化合物在凝聚相（例如雨滴）中的光反应性知之甚少。 PI建议继续使用共振拉曼光谱（强度和时间分辨）以及飞秒泵浦探测测量对气相和凝聚相中的OClO光化学进行详细研究。 PI然后建议以类似的方式研究ClOCl、亚硝酰卤化物和硝酸烷基酯，以确定这些系统的一般趋势。 这一建议的一个成功的结果将是一个模型的预测溶剂对小分子的光反应性的影响。拟议的工作是特别及时的，因为认识到大气化学家，多相反应可以显着地促进整体过程，因此必须包括在大气模型。

Professor Philip Reid of University of Washington is funded by the Experimental Physical Chemistry program to perform experimental studies on the effects of solvent on chemical reactions relevant to the environment. Halooxide photochemistry is important in the atmosphere; while the gas phase photoreactivity has been well studied in the laboratory, not much is known about photoreactivity of these compounds in the condensed phase (e.g. rain droplets). The PI proposes to continue detailed studies on OClO photochemistry in both gas and condensed phases using resonance Raman spectroscopy (intensity and time-resolved) as well as femtosecond pump-probe measurements. The PI then proposes to study ClOCl, nitrosyl halides and alkyl nitrates in a similar manner to establish general trends in these systems. A successful outcome of this proposal would be a model for the prediction of solvent effects on the photoreactivity of small molecules. The proposed work is especially timely because of recognition by atmospheric chemists that heterogeneous reactions can contribute significantly to overall processes, and therefore must be included in models of the atmosphere.