Interfacial Fenton Chemistry on Aqueous Organic Aerosols

水性有机气溶胶的界面芬顿化学

• 批准号: 1744353
• 负责人: Michael Hoffmann
• 金额: $ 64.36万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-10-01 至 2020-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1744353&HistoricalAwards=false
• 关键词: Interfacial; Fenton; Chemistry; Aqueous; Organic

This research is focused on the study of how gas-phase species are converted to and processed in tropospheric aerosols. The proposed experiments represent an innovative approach to understanding the nature of the chemical interactions between reactive gases and organic matter in the presence of transition metal ions at air-aqueous interfaces. The results are expected to provide new information on the formation and evolution of tropospheric aerosols, especially those that are known to have adverse health impacts.This effort includes a systematic study of gas-liquid reactions taking place on the surface of aqueous and aqueous/water soluble organic solutions of selected substrates, exposed to the major gaseous O3, H2O2 and NO2 oxidants in ambient air under experimental conditions relevant to the troposphere. The central aim is to map the dependence of the extent of Fenton chemistry on: (1) pH, (2) the nature of typical organic substrates, either alone or in synthetic mixtures, (3) the presence of ligands representative of those found in secondary organic aerosol, as well as sequestering ligands, and (4) the presence of Cu ions. The project will provide new data to improve models of interfacial reactions on organic material in the atmosphere.

本研究的重点是研究气相物质如何转化为对流层气溶胶并在其中进行处理。所提出的实验代表了一种创新的方法来理解在空气-水界面处存在过渡金属离子的情况下反应性气体和有机物之间的化学相互作用的性质。这些结果有望为对流层气溶胶的形成和演变提供新的信息，特别是那些已知对健康有不利影响的气溶胶。这项工作包括系统研究选定基质的水溶液和水/水溶性有机溶液表面上发生的气-液反应，暴露于主要的气态O3，H2 O2和NO2氧化剂在环境空气中的实验条件下有关对流层。主要目的是绘制芬顿化学的程度对以下的依赖性：（1）pH，（2）典型有机底物的性质，单独或在合成混合物中，（3）存在的配体代表那些在二次有机气溶胶中发现的，以及螯合配体，和（4）铜离子的存在。 该项目将提供新的数据，以改进大气中有机材料界面反应的模型。

项目成果

Criegee Chemistry on Aqueous Organic Surfaces

• DOI: 10.1021/acs.jpclett.7b00434
• 发表时间: 2017-04-06
• 期刊: JOURNAL OF PHYSICAL CHEMISTRY LETTERS
• 影响因子: 5.7
• 作者: Enami, Shinichi;Colussi, A. J.
• 通讯作者: Colussi, A. J.

Iodide Accelerates the Processing of Biogenic Monoterpene Emissions on Marine Aerosols

• DOI: 10.1021/acsomega.9b00024
• 发表时间: 2019-04
• 期刊: ACS Omega
• 影响因子: 4.1
• 作者: Shinichi Enami;M. Hoffmann;A. Colussi

Vacuum-assisted headspace single-drop microextraction: Eliminating interfacial gas-phase limitations

真空辅助顶空单滴微萃取：消除界面气相限制

• DOI: 10.1016/j.aca.2019.09.056
• 发表时间: 2019
• 期刊: Analytica Chimica Acta
• 影响因子: 6.2
• 作者: Psillakis, Elefteria;Koutela, Niki;Colussi, Agustín J.
• 通讯作者: Colussi, Agustín J.

Criegee Intermediates React with Levoglucosan on Water

• DOI: 10.1021/acs.jpclett.7b01665
• 发表时间: 2017-08-17
• 期刊: JOURNAL OF PHYSICAL CHEMISTRY LETTERS
• 影响因子: 5.7
• 作者: Enami, Shinichi;Hoffmann, Michael R.;Colussi, A. J.
• 通讯作者: Colussi, A. J.

Efficient scavenging of Criegee intermediates on water by surface-active cis-pinonic acid

• DOI: 10.1039/c7cp03869k
• 发表时间: 2017-07-14
• 期刊: PHYSICAL CHEMISTRY CHEMICAL PHYSICS
• 影响因子: 3.3
• 作者: Enami, Shinichi;Colussi, A. J.
• 通讯作者: Colussi, A. J.