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Vacuum ultraviolet photodynamics of the methyl peroxy radical studied by double imaging photoelectron photoion coincidences

文献类型：期刊论文

作者Tang, Xiaofeng6; Gu, Xuejun6; Lin, Xiaoxiao6; Zhang, Weijun6,7; Garcia, Gustavo A.1; Fittschen, Christa5; Loison, Jean-Christophe4; Voronova, Krisztina3; Sztaray, Balint2; Nahon, Laurent1
刊名JOURNAL OF CHEMICAL PHYSICS
出版日期2020-03-14
卷号152
ISSN号0021-9606
DOI10.1063/5.0002109
通讯作者Tang, Xiaofeng(tangxf@aiofm.ac.cn) ; Garcia, Gustavo A.(gustavo.garcia@synchrotron-soleil.fr)
英文摘要The vacuum ultraviolet photoionization of the methyl peroxy radical, CH3O2, and unimolecular dissociation of internal energy selected CH3O2+ cations were investigated in the 9.7-12.0 eV energy range by synchrotron-based double imaging photoelectron photoion coincidence. A microwave discharge flow tube was employed to produce CH3O2 via the reaction of methyl radicals (CH3) with oxygen gas. After identifying and separating the different sources of CH3+ from photoionization of CH3 or dissociative photoionization of CH3O2, the high resolution slow photoelectron spectrum (SPES) of CH3O2 was obtained, exhibiting two broad bands superimposed with a complex vibrational structure. The first band of the SPES is attributed to the X(3)A '' and a(1)A ' overlapped electronic states of CH3O2+ and the second is assigned to the b(1)A ' electronic state with the help of theoretical calculations. The adiabatic ionization energy of CH3O2 is derived as 10.215 +/- 0.015 eV, in good agreement with high-accuracy theoretical data from the literature. The vertical ionization energy of the b(1)A ' electronic state is measured to be 11.5 eV and this state fully dissociates into CH3+ and O-2 fragments. The 0 K adiabatic appearance energy (AE(0K)) of the CH3+ fragment ion is determined to be 11.15 +/- 0.02 eV.
WOS关键词ALKYLPEROXY RADICALS ; SPECTROSCOPY ; DISSOCIATION ; STABILITY ; CH3O2
资助项目National Natural Science Foundation of China[21773249] ; National Natural Science Foundation of China[91961123] ; National Natural Science Foundation of China[91544228] ; International Partnership Program of Chinese Academy of Sciences[116134KYSB20170048] ; French Agence Nationale de la Recherche (ANR)[ANR-12-BS08-0020-02] ; Chinese Academy of Sciences President's International Fellowship Initiative[2018VMA0055] ; Xu Guangqi program[43270ZD] ; National Science Foundation[CHE-1665464]
WOS研究方向Chemistry ; Physics
语种英语
WOS记录号WOS:000519912200001
出版者AMER INST PHYSICS
资助机构National Natural Science Foundation of China ; International Partnership Program of Chinese Academy of Sciences ; French Agence Nationale de la Recherche (ANR) ; Chinese Academy of Sciences President's International Fellowship Initiative ; Xu Guangqi program ; National Science Foundation
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/103829]  
专题中国科学院合肥物质科学研究院
通讯作者Tang, Xiaofeng; Garcia, Gustavo A.
作者单位1.Synchrotron SOLEIL, BP 48, F-91192 Gif Sur Yvette, France
2.Univ Pacific, Dept Chem, Stockton, CA 95211 USA
3.Univ Nevada, Dept Chem, Reno, NV 89557 USA
4.Univ Bordeaux 1, ISM, CNRS, 351 Cours Liberat, F-33405 Talence, France
5.Univ Lille, PC2A Physicochim Processus Combust & Atmosphere, CNRS, UMR 8522, F-59000 Lille, France
6.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Lab Atmospher Physicochem, Hefei 230031, Anhui, Peoples R China
7.Univ Sci & Technol China, Sch Environm Sci & Optoelect Technol, Hefei 230026, Anhui, Peoples R China
推荐引用方式
GB/T 7714		 Tang, Xiaofeng,Gu, Xuejun,Lin, Xiaoxiao,et al. Vacuum ultraviolet photodynamics of the methyl peroxy radical studied by double imaging photoelectron photoion coincidences[J]. JOURNAL OF CHEMICAL PHYSICS,2020,152.
APA Tang, Xiaofeng.,Gu, Xuejun.,Lin, Xiaoxiao.,Zhang, Weijun.,Garcia, Gustavo A..,...&Nahon, Laurent.(2020).Vacuum ultraviolet photodynamics of the methyl peroxy radical studied by double imaging photoelectron photoion coincidences.JOURNAL OF CHEMICAL PHYSICS,152.
MLA Tang, Xiaofeng,et al."Vacuum ultraviolet photodynamics of the methyl peroxy radical studied by double imaging photoelectron photoion coincidences".JOURNAL OF CHEMICAL PHYSICS 152(2020).

入库方式： OAI收割

来源：合肥物质科学研究院

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