Three body photodissociation of the water molecule and its implications for prebiotic oxygen production
文献类型：期刊论文
| 作者 | Chang, Yao7; Yu, Yong7; An, Feng6; Luo, Zijie5,7; Quan, Donghui4 ; Zhang, Xia3; Hu, Xixi6; Li, Qinming7; Yang, Jiayue7; Chen, Zhichao7
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| 刊名 | Nature Communications
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| 出版日期 | 2021-04-01 |
| 卷号 | 12期号:1页码:2476 |
| 关键词 | dissociation dynamics 121.6 nm h2o energy d2o photoabsorption fluorescence spectroscopy ionization atmosphere Science & Technology - Other Topics |
| ISSN号 | 2041-1723 |
| DOI | 10.1038/s41467-021-22824-7 |
| 产权排序 | 5 |
| 文献子类 | Article |
| 英文摘要 | The provenance of oxygen on the Earth and other planets in the Solar System is a fundamental issue. It has been widely accepted that the only prebiotic pathway to produce oxygen in the Earth's primitive atmosphere was via vacuum ultraviolet (VUV) photodissociation of CO2 and subsequent two O atom recombination. Here, we provide experimental evidence of three-body dissociation (TBD) of H2O to produce O atoms in both D-1 and P-3 states upon VUV excitation using a tunable VUV free electron laser. Experimental results show that the TBD is the dominant pathway in the VUV H2O photochemistry at wavelengths between 90 and 107.4nm. The relative abundance of water in the interstellar space with its exposure to the intense VUV radiation suggests that the TBD of H2O and subsequent O atom recombination should be an important prebiotic O-2-production, which may need to be incorporated into interstellar photochemical models. Three-body dissociation of water, producing one oxygen and two hydrogen atoms, has been difficult to investigate due to the lack of intense vacuum ultraviolet sources. Here, using a tunable free-electron laser, the authors obtain quantum yields for this channel showing that it is a possible route to prebiotic oxygen formation in interstellar environments. |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000656482800006 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/4705]  |
| 专题 | 天体化学研究团组 |
| 作者单位 | 1.Department of Chemistry, College of Science, Southern University of Science and Technology, Shenzhen, China 2.School of Chemistry, University of Bristol, Bristol, UK; 3.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi, China; 4.Eastern Kentucky University, Richmond, KY, USA; 5.Department of Physics, School of Science, Dalian Maritime University, Dalian, Liaoning, China; 6.Key Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Institute of Theoretical and Computational Chemistry, Nanjing University, Nanjing, China; 7.State Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent Light Source, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China; |
| 推荐引用方式 GB/T 7714 | Chang, Yao,Yu, Yong,An, Feng,et al. Three body photodissociation of the water molecule and its implications for prebiotic oxygen production[J]. Nature Communications,2021,12(1):2476. |
| APA | Chang, Yao.,Yu, Yong.,An, Feng.,Luo, Zijie.,Quan, Donghui.,...&Yang, Xueming.(2021).Three body photodissociation of the water molecule and its implications for prebiotic oxygen production.Nature Communications,12(1),2476. |
| MLA | Chang, Yao,et al."Three body photodissociation of the water molecule and its implications for prebiotic oxygen production".Nature Communications 12.1(2021):2476. |
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