烯烃臭氧化反应机制的研究进展

The research progress on the reaction mechanisms of ozone and alkenes

烯烃与臭氧反应在化工合成中常用来合成醛和酮,此反应在污水处理过程中常用来去除有机污染物,还可以用作有机结构的鉴定.烯烃是对流层大气中最活泼的VOC,与臭氧反应可以生成OH自由基,也是二次有机气溶胶(SOA)的重要来源.本文主要内容包括:(1)气相和液相中烯烃臭氧化反应对环境的影响.(2)烯烃臭氧化反应的研究进展.该部分主要包括以Criegee机制为基础的液相和气相中烯烃臭氧化反应机理的研究进展;三种中间体的可能结构及反应过程中的立体选择性问题;气相中烯烃臭氧化反应体系的压力及Criegee中间体的结构对OH自由基产额的影响;异戊二烯和萜烯类化合物对对流层中SOA生成的影响.(3)低温基质隔离技术在烯烃臭氧化反应研究中的应用,并列举了最新的研究成果.

The reaction of alkenes with ozone is commonly used to synthesize aldehydes and ketones in industrial synthetic chemistry, and to remove organic pollutants in waste water treatment processes. The reaction can also be used to identify the organic structure. Alkenes, regarded as the most active VOC in the troposphere, can react with ozone to produce OH radical. They also contribute significantly to secondary organic aerosols （SOA）. The following aspects are introduced： （1） The reaction of ozone with alkenes in the gas phase and condensed phase and its impacts on the environment. （2） Research progress of the reaction of ozone with alkenes. This section includes, based on Criegee mechanism, （a） the research progress on the reaction of alkenes with ozone in condensed phase and gas phase. （b） the possible structure of the three intermediates, and the question of selectivity and stereochemistry of each step. （c） the effect on the radical production from the pressure of alkenes reacting with ozone and the structure of Criegee intermediates in gas phase; The effect on SOA formation in the troposphere from the isoprene and terpenoid compounds. （3） The application of low- temperature matrix isolation in the reaction of alkenes with ozone, and the latest research results are cited in this paper.