RUI: Theoretical Investigation of the Gas-Phase Reaction of NO2(g) + H2O(g) +NH3(g): A new source of HONO Gas and NH4NO3(s) Aerosols.

化学学部环境化学科学（ECS）项目将支持美国加州州立大学富勒顿分校陶福明教授的研究项目。陶教授和他的学生将对NO2(g) + NH3(g) + H2O(g)的气相反应作为大气中硝酸（HONO）气体和硝酸铵（NH4NO3）气溶胶的可能新来源进行理论研究。他们将执行高水平的量子化学计算来表征反应，并考虑沿各种反应途径的瞬态分子间复合物和反应中间体。动力学计算将随后评估由量子化学计算确定的不同途径的反应速率。将探讨热力学关系，以了解平衡条件以及气态物质（NO2， HONO,NH3）的浓度以及在几种典型大气条件下产生的气溶胶颗粒。在这个项目中研究的化学很重要，因为它可能对对流层和室内氮物种的分布产生重大影响。这个理论项目的完成将增强我们对大气中氮物种动态状态的基本认识。这些结果将促进实验室实验和实地测量，并将用于更精确的大气成分建模和空气质量预报。这项研究将为加州州立大学富勒顿分校的学生提供极好的机会，参与环境化学科学领域的前沿研究项目。

The Environmental Chemical Sciences (ECS) program of the Division of Chemistry will support the research project of Prof. Fu-Ming Tao of California State University at Fullerton. Prof. Tao and his students will carry out theoretical research on the gas phase reaction of NO2(g) + NH3(g) + H2O(g) as a possible new source of nitrous acid (HONO) gas and ammonium nitrate (NH4NO3) aerosols in the atmosphere. They will perform high level quantum chemical computations to characterize the reaction and consider transient intermolecular complexes and reaction intermediates along various reaction pathways. Kinetic calculations will follow to evaluate the reaction rates of the different pathways determined by quantum chemical calculations. Thermodynamic relations will be explored to understand the equilibrium conditions as well as concentrations of the gaseous species (NO2, HONO,NH3) and the resulting aerosol particles in several typical atmospheric conditions.The chemistry studied in this project is important since it is likely to have a significant impact on the distributions of tropospheric and indoor nitrogen species. Completion of this theory project will enhance our fundamental understanding of the dynamical state of nitrogen species in the atmosphere. The results will promote laboratory experiments and field measurements, and will be used for more accurate atmospheric composition modeling and air quality forecasts. The study will provide excellent opportunities to students at the California State University at Fullerton to work on a cutting edge research project in environmental chemical sciences.