Effects of isoprene on the ozonolysis of△^(3)-carene andβ-caryophyllene:Mechanisms of secondary organic aerosol formation and cross-dimerization  

作　　者：Zhaoyan Zhang Yingqi Zhao Ya Zhao Xiangyu Zang Hua Xie Jiayue Yang Weiqing Zhang Guorong Wu Gang Li Xueming Yang Ling Jiang 

机构地区：[1]State Key Laboratory of Molecular Reaction Dynamics,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Hefei National Laboratory,Hefei 230088,China [4]Department of Chemistry and Guangdong Provincial Key Laboratory of Catalytic Chemistry,Southern University of Science and Technology,Shenzhen 518055,China

出　　处：《Journal of Environmental Sciences》2025年第4期556-570,共15页环境科学学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(Nos.92361302,22125303,92061203,and 22288201);the National Key Research and Development Program of China(No.2021YFA1400501);the Innovation Program for Quantum Science and Technology(No.2021ZD0303304);Dalian Institute of Chemical Physics(No.DICP DCLS201702);Chinese Academy of Sciences(No.GJJSTD20220001).

摘　　要：Elucidating the mutual effects between the different volatile organic compounds(VOCs)is crucial for comprehending the formation mechanism of atmospheric secondary organic aerosols(SOA).Here,the mixed VOCs experiments of isoprene and△^(3)-carene/β-caryophyllene were carried out in the presence of O_(3)using an indoor smog chamber.The suppression effect of isoprene was recognized by the scanning mobility particle sizer spectrometer,online vacuum ultraviolet free electron laser(VUV-FEL)photoionization aerosol mass spectrometry,and quantum chemical calculations.The results indicate that the suppression effect of isoprene on the ozonolysis of△^(3)-carene andβ-caryophyllene shows fluctuating and monotonous trends,respectively.The carbon content of the precursor could be themain factor for regulating the strength of the suppression effect.Plausible structures and formation mechanisms of several new products generated from the single VOC precursor and VOC-cross-reaction are proposed,which enrich the category of VOC oxidation products.Meanwhile,a new dimerization mechanism of the RO_(2)+R’O_(2)reaction is suggested,which offers an intriguing perspective on the gas phase formation process of particle phase accretion products.The present findings provide valuable insights into clarifying the pivotal roles played by isoprene in the interplay between different VOCs and understanding of SOA formation mechanisms of VOC mixtures,especially nearby the emission origins.

关 键 词：Secondary organic aerosol △^(3)-Carene andβ-caryophyllene OZONOLYSIS Cross reaction ISOPRENE 

分 类 号：X513[环境科学与工程—环境工程]