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Functionalized Secondary Organic Particle Phase Products from Terpenes and Terpene Oxidation Products (FuProTer II)

来自萜烯和萜烯氧化产物的功能化次级有机颗粒相产物 (FuProTer II)

基本信息

批准号：
122961413
负责人：
Professor Dr. Hartmut Herrmann
金额：
--
依托单位：
Leibniz-Institut für Troposphärenforschung e.V. (TROPOS)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2009
资助国家：
德国
起止时间：
2008-12-31 至 2014-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/122961413?language=en
关键词：
Functionalized Secondary Organic Particle Phase

项目摘要

Organic matter frequently makes up the largest aerosol fraction over continental regions. Because of the large influence of particulate organic compounds on thermodynamic, microphysical and chemical properties a quantitative description of the impact of organic compounds to aerosol formation and modification is needed. Within this project the reaction of terpenes and terpene oxidation products will be studied in an aerosol chamber. Main focus is the formation of functionalized particulate organic products on pre-existing particles with different acidities. First, the reactions of selected terpenes (α-pinene, β-pinene and limonene) with OH-radicals will be studied to get a deeper insight into the mechanisms of particulate organic matter formation. Here especially the conditions and reaction pathways for the formation of oligomeric particulate products and of sulfate esters which have been found as products of the ozonolysis of terpenes in our preceding DFG-project should be elucidated to get an estimate of the relevance of these compounds to the real atmosphere. Secondly, the reaction of known semivolatile terpene oxidation products (pinonaldehyde, nopinon, endolim) with OH-radicals will be investigated to improve our understanding of the further steps in atmospheric terpene oxidation mechanisms. The influence of reaction conditions (R.H., initial concentrations) on particulate products and yields will also be studied.

有机物通常构成大陆地区最大的气溶胶部分。由于颗粒有机化合物对热力学、微物理和化学性质的影响很大，因此需要定量描述有机化合物对气溶胶形成和改性的影响。在该项目中，将在气溶胶室中研究萜烯和萜烯氧化产物的反应。主要焦点是在具有不同酸度的现有颗粒上形成功能化颗粒有机产品。首先，将研究选定的萜烯（α-蒎烯、β-蒎烯和柠檬烯）与羟基自由基的反应，以更深入地了解颗粒有机物形成的机制。这里特别应该阐明低聚颗粒产物和硫酸酯形成的条件和反应途径，这些产物在我们之前的 DFG 项目中被发现是萜烯臭氧分解的产物，以估计这些化合物与真实大气的相关性。其次，将研究已知的半挥发性萜烯氧化产物（pinon醛、nopinon、endolim）与OH自由基的反应，以提高我们对大气萜烯氧化机制进一步步骤的理解。还将研究反应条件（相对湿度、初始浓度）对颗粒产物和产量的影响。