Just add water dimers
Just add water dimers
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DOI：
10.1126/science.aaa5506
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发表时间：
2015-02
期刊：
影响因子：
56.9
通讯作者：
M. Okumura
中科院分区：
文献类型：
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作者：
M. Okumura
与水二聚体的快速反应可能限制最简单的Criegee中间体对大气化学的影响[另见Chao等人的报告]。烯烃在排放到对流层的天然和人造挥发性有机化合物（VOCs）中占很大比例。它们的氧化产物会降低空气质量，导致气候变暖。烯烃氧化被认为涉及克里基中间体（CIs），这是臭氧与烯烃反应时形成的高活性分子。然而，如果CIs与水迅速反应，其影响可能有限。建模者发现很难量化CI对大气成分的影响，因为CI与水反应的实验室数据一直是相互矛盾的。在本期的第751页，Chao等人(1)表明，最简单的CI，甲醛氧化物（2oo）与水二聚体（H2O）2反应迅速。Lewis等人(2)也报道了类似的结果。
Fast reaction with water dimers may limit the impact of the simplest Criegee intermediate on atmospheric chemistry [Also see Report by Chao et al.] Alkenes constitute a large fraction of the natural and human-made volatile organic compounds (VOCs) that are emitted into the troposphere. Their oxidation products degrade air quality and contribute to climate warming. Alkene oxidation is thought to involve Criegee intermediates (CIs), highly reactive molecules that form when ozone reacts with alkenes. However, the impact of CIs may be limited if they react rapidly with water. Modelers have found it difficult to quantify the effect of CIs on atmospheric composition, because laboratory data on CI reactions with water have been contradictory. On page 751 of this issue, Chao et al. (1) show that the simplest CI, formaldehyde oxide (CH2OO), reacts rapidly with the water dimer, (H2O)2. Similar results are reported by Lewis et al. (2).