Vacuum Ultraviolet Free-Electron Laser Photoionization Mass Spectrometry of Alpha-pinene Ozonolysis  

阿尔法蒎烯臭氧分解反应的极紫外自山电子激光光电离质谱研究

作　　者：Xiangyu Zang Zhaoyan Zhang Chong Wang Tiantong Wang Huijun Zheng Hua Xie Jiayue Yang Dongxu Dai Guorong Wu Weiqing Zhang Gang Li Xueming Yang Ling Jiang 臧翔宇;张兆燕;王冲;王天通;郑会俊;谢华;杨家岳;戴东旭;吴国荣;张未卿;李刚;杨学明;江凌(大连理工大学张大煜化学学院,大连116024;中国科学院大连化学物理研究所分子反应动力学国家重点实验室,大连116023;中国科学院大学,北京100049;南方科技大学理学院化学系,深圳518055)

机构地区：[1]Zhang Dayu School of Chemistry,Dalian University of Technology,Dalian 116024,China [2]State Key Laboratory of Molecular Reaction Dynamics,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]Department of Chemistry,School of Science,Southern University of Science and Technology,Shenzhen 518055,China

出　　处：《Chinese Journal of Chemical Physics》2022年第2期281-288,I0002,共9页化学物理学报（英文）

基　　金：financially supported by the National Natural Science Foundation of China(No.22125303,No.92061203,and No.21688102);the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB17000000);Dalian Institute of Chemical Physics(DICP DCLS201701);Chinese Academy of Sciences(No.GJJSTD20190002);K.C.Wong Education Foundation(No.GJTD-2018-06)。

摘　　要：α-pinene is the most abundant monoterpene that represents an important family of volatile organic compounds.Molecular identification of key transient compounds during theα-pinene ozonolysis has been proven to be a challenging experimental target because of a large number of intermediates and products involved.Here we exploit the recently developed hybrid instruments that integrate aerosol mass spectrometry with a vacuum ultraviolet free-electron laser to study theα-pinene ozonolysis.The experiments ofα-pinene ozonolysis are performed in an indoor smog chamber,with reactor having a volume of 2 m^(3) which is made of fluorinated ethylene propylene film.Distinct mass spectral peaks provide direct experimental signatures of previously unseen compounds produced from the reaction ofα-pinene with O_(3).With the aid of quantum chemical calculations,plausible mechanisms for the formation of these new compounds are proposed.These findings provide crucial information on fundamental understanding of the initial steps ofα-pinene oxidation and the subsequent processes of new particle formation.

关 键 词：Vacuum ultraviolet free-electron laser PHOTOIONIZATION Mass spectrometry Volatile organic compound OZONOLYSIS 

分 类 号：O657.63[理学—分析化学] X51[理学—化学]