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

doi:10.1063/5.0002109

HFCAS OpenIR

	Vacuum ultraviolet photodynamics of the methyl peroxy radical studied by double imaging photoelectron photoion coincidences
	Tang, Xiaofeng 1; Gu, Xuejun1 ; Lin, Xiaoxiao1 ; Zhang, Weijun1,2 ; Garcia, Gustavo A.3; Fittschen, Christa 4; Loison, Jean-Christophe 5; Voronova, Krisztina 6; Sztaray, Balint 7; Nahon, Laurent 3
	2020-03-14
发表期刊	JOURNAL OF CHEMICAL PHYSICS
ISSN	0021-9606
通讯作者	Tang, Xiaofeng(tangxf@aiofm.ac.cn) ; Garcia, Gustavo A.(gustavo.garcia@synchrotron-soleil.fr)
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.
DOI	10.1063/5.0002109
关键词[WOS]	ALKYLPEROXY RADICALS ; SPECTROSCOPY ; DISSOCIATION ; STABILITY ; CH3O2
收录类别	SCI
语种	英语
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]
项目资助者	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
WOS研究方向	Chemistry ; Physics
WOS类目	Chemistry, Physical ; Physics, Atomic, Molecular & Chemical
WOS记录号	WOS:000519912200001
出版者	AMER INST PHYSICS
引用统计	被引频次：15[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/103830
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.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Lab Atmospher Physicochem, Hefei 230031, Anhui, Peoples R China 2.Univ Sci & Technol China, Sch Environm Sci & Optoelect Technol, Hefei 230026, Anhui, Peoples R China 3.Synchrotron SOLEIL, BP 48, F-91192 Gif Sur Yvette, France 4.Univ Lille, PC2A Physicochim Processus Combust & Atmosphere, CNRS, UMR 8522, F-59000 Lille, France 5.Univ Bordeaux 1, ISM, CNRS, 351 Cours Liberat, F-33405 Talence, France 6.Univ Nevada, Dept Chem, Reno, NV 89557 USA 7.Univ Pacific, Dept Chem, Stockton, CA 95211 USA
第一作者单位	中科院安徽光学精密机械研究所
通讯作者单位	中科院安徽光学精密机械研究所
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).