气候变化领域集成服务门户(CCPortal): Unexpected epoxide formation in the gas-phase photooxidation of isoprene

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DOI	10.1126/science.1172910
	Unexpected epoxide formation in the gas-phase photooxidation of isoprene
	Paulot F.; Crounse J.D.; Kjaergaard H.G.; Kürten A.; Clair J.M.S.; Seinfeld J.H.; Wennberg P.O.
发表日期	2009
ISSN	0036-8075
起始页码	730
结束页码	733
卷号	325 期号:5941
英文摘要	Emissions of nonmethane hydrocarbon compounds to the atmosphere from the biosphere exceed those from anthropogenic activity. Isoprene, a five-carbon diene, contributes more than 40% of these emissions. Once emitted to the atmosphere, isoprene is rapidly oxidized by the hydroxyl radical OH. We report here that under pristine conditions isoprene is oxidized primarily to hydroxyhydroperoxides. Further oxidation of these hydroxyhydroperoxides by OH leads efficiently to the formation of dihydroxyepoxides and OH reformation. Global simulations show an enormous flux - nearly 100 teragrams of carbon per year - of these epoxides to the atmosphere. The discovery of these highly soluble epoxides provides a missing link tying the gas-phase degradation of isoprene to the observed formation of organic aerosols.
英文关键词	carbon; epoxide; hydroperoxide derivative; isoprene; aerosol; anthropogenic source; emission; human activity; hydrogen peroxide; hydroxyl radical; isoprene; modeling; photooxidation; aerosol; article; atmosphere; degradation; gas; photooxidation; priority journal; simulation
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/245014
作者单位	Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA 91125, United States; Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, United States; Department of Chemistry, University of Otago, Dunedin, New Zealand; Department of Chemistry, University of Copenhagen, Copenhagen, Denmark; Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, United States; Institute for Atmospheric and Environmental Sciences, Goethe University, Frankfurt am Main, Germany
推荐引用方式 GB/T 7714	Paulot F.,Crounse J.D.,Kjaergaard H.G.,et al. Unexpected epoxide formation in the gas-phase photooxidation of isoprene[J],2009,325(5941).
APA	Paulot F..,Crounse J.D..,Kjaergaard H.G..,Kürten A..,Clair J.M.S..,...&Wennberg P.O..(2009).Unexpected epoxide formation in the gas-phase photooxidation of isoprene.Science,325(5941).
MLA	Paulot F.,et al."Unexpected epoxide formation in the gas-phase photooxidation of isoprene".Science 325.5941(2009).