RUI: Heterogeneous and Photochemical Reactivity of Surface Adsorbed Organics with Atmospheric Oxidants

表面吸附的有机物影响大气气溶胶的异质性和光化学反应性，从而影响对流层光化学循环并改变气溶胶特性。由于对流层中表面吸附有机物的组成不同，我们对这种化学的理解还远未完成。该项目描述了凝相红外光谱研究，旨在通过同位素实验鉴定凝相产物、量化反应动力学和阐明反应机理。感兴趣的具体系统包括：木质素热解产物、硝基酚和官能化的多环芳族化合物，包括腐殖酸和富里酸，在黑暗和光照条件下暴露于二氧化氮或臭氧;以及这些有机物吸附在对流层气溶胶替代物上的异质反应性的比较。更广泛的影响包括：（1）支持德鲁大学物理/大气化学的第一个积极研究计划，一所小型文科学院(2)在项目的三年期间提供九个本科生暑期研究职位。在首席研究员的指导下，德鲁大学的本科生将在项目的各个方面发挥不可或缺的作用，包括实验设计，数据采集和分析，以及将结果作为与本科生合著者的期刊文章和专业会议上的演讲传达给科学界。(3)为一名当地高中教师提供为期三个夏天的研究机会。将优先考虑来自科学代表性不足的群体的学生比例较高的地区的教师。大气科学课程材料将由教师和首席研究员共同开发和实施。(4)通过整合研究和教学来支持环境和大气化学的课程扩展，以提高德鲁大学的化学专业，并支持环境研究和可持续发展的新专业。支持将有助于这个新的主要吸引和支持感兴趣的本科生环境科学的势头。

Surface adsorbed organics affect the heterogeneous and photochemical reactivity of atmospheric aerosols, thereby impacting tropospheric photochemical cycles and altering aerosol properties. Due to the diverse composition of surface adsorbed organics in the troposphere, our understanding of this chemistry is far from complete. This project describes condensed-phase infrared spectroscopic studies aimed at identifying condensed-phase products, quantifying reaction kinetics, and elucidating reaction mechanisms by means of isotopic experiments. Specific systems of interest include: lignin pyrolysis products, nitrophenols, and functionalized polycyclic aromatic compounds, including humic and fulvic acids, exposed to nitrogen dioxide or ozone under dark and light conditions; and a comparison of the heterogeneous reactivity of these organics adsorbed on tropospheric aerosol surrogates.Broader impacts include (1) Supporting the first active research program in physical/atmospheric chemistry at Drew University, a small liberal arts college. (2) Providing nine undergraduate summer research positions over the three-year duration of the project. Under the guidance of the principal investigator, undergraduate students at Drew will play an integral role in all aspects of the project, including experimental design, data acquisition and analysis, and communication of results to the scientific community as journal articles with undergraduate co-authors and as presentations at professional meetings. (3) Providing one local high school teacher a research opportunity for three summers. Preference will be given to a teacher from a district with a high percentage of students from groups underrepresented in science. Atmospheric science curricular material will be co-developed and co-implemented by the teacher and principal investigator. (4) Supporting curricular expansions in environmental and atmospheric chemistry by integrating research and teaching to enhance the Drew University chemistry major and by supporting a new major in environmental studies and sustainability. Support will contribute to the momentum of this new major to attract and support undergraduate students interested in environmental sciences.