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| DOI | 10.1016/j.atmosenv.2021.118352 |
| Photolysis of multifunctional carbonyl compounds under natural irradiation at EUPHORE | |
| Tomas A.; Aslan L.; Muñoz A.; Ródenas M.; Vera T.; Borrás E.; Coddeville P.; Fittschen C. | |
| 发表日期 | 2021 |
| ISSN | 1352-2310 |
| 卷号 | 253 |
| 英文摘要 | Photolysis is one the main drivers in atmospheric chemistry. Volatile organic compounds that bear one or more carbonyl functions can absorb UV light between 295 nm and 450 nm, enabling them to possibly photolyze in the atmosphere. Yet, very few data are available regarding the impact of such photolysis processes on the fate of multifunctional carbonyls. In the present work, we investigated the photodissociation of one α-diketone and three hydroxyketones under real sunlight at the European Photoreactor EUPHORE. The obtained photolysis frequencies normalized by NO2 photolysis were: 2,3-pentanedione (PTD): (3.4 ± 0.6) × 10−2, 4-hydroxy-4-methyl-2-pentanone (4H4M2P): (6.2 ± 2.9) × 10−4, 3-hydroxy-3-methyl-2-butanone (3H3M2B): (8.2 ± 4.9) × 10−4, and 4-hydroxy-3-hexanone (4H3H): (5.1 ± 3.0) × 10−4. These ratios represent the first data for three of them, to our knowledge. Reaction products were also investigated and carbon balances of 70–100% in the gas-phase have been obtained. A photolysis reaction mechanism is proposed for 4H3H for the first time, based on the observed products. Atmospheric lifetimes span between 39 min for PTD to 1–2 days for hydroxyketones. The present work shows that photolysis of multi-oxygenated VOCs may be significant and needs to be taken into account in atmospheric chemistry models where it represents an additional source of radicals. © 2021 Elsevier Ltd |
| 关键词 | AtmosphereDioneHydroxyketonesLifetimeOxygenated-VOCsPhotolysis |
| 语种 | 英语 |
| scopus关键词 | Atmospheric chemistry; Ketones; Photolysis; Carbonyl function; Diketones; Dione; Hexanone; Lifetime; Natural irradiation; Oxygenated-VOC; UV-light; Volatile organics; [carbonyl; Volatile organic compounds; 1,2 dicarbonyl derivative; 2,3 pentanedione; 3 hydroxy 3 methyl 2 butanone; 4 hydroxy 3 hexanone; 4 hydroxy 4 methyl 2 pentanone; ketol; nitrogen dioxide; unclassified drug; atmospheric chemistry; chemical compound; irradiation; ketone; photolysis; volatile organic compound; Article; atmosphere; carbon balance; concentration (parameter); Europe; Fourier transform infrared spectroscopy; photolysis; priority journal; proton transfer reaction mass spectrometry; quantum yield; reaction analysis; structure activity relation; sunlight |
| 来源期刊 | ATMOSPHERIC ENVIRONMENT
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| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/248478 |
| 作者单位 | IMT Lille Douai, Institut Mines-Télécom, Univ. Lille, Center for Energy and Environment, Lille, F-59000, France; Fundación CEAM - EUPHORE Laboratories, C/Charles R. Darwin 14, Parque Tecnológico, Paterna, Valencia 46980, Spain; Université Lille, CNRS, UMR 8522 - PhysicoChimie des Processus de Combustion et de L'Atmosphère (PC2A), Lille, 59000, France |
| 推荐引用方式 GB/T 7714 | Tomas A.,Aslan L.,Muñoz A.,et al. Photolysis of multifunctional carbonyl compounds under natural irradiation at EUPHORE[J],2021,253. |
| APA | Tomas A..,Aslan L..,Muñoz A..,Ródenas M..,Vera T..,...&Fittschen C..(2021).Photolysis of multifunctional carbonyl compounds under natural irradiation at EUPHORE.ATMOSPHERIC ENVIRONMENT,253. |
| MLA | Tomas A.,et al."Photolysis of multifunctional carbonyl compounds under natural irradiation at EUPHORE".ATMOSPHERIC ENVIRONMENT 253(2021). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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