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Kinetic Understanding of the Ultrahigh Ionization Efficiencies (up to 28%) of Excited-State CH2Cl2-Induced Associative Ionization: A Case Study with Nitro Compounds
Huang, Jingyun; Yang, Bo; Shu, Jinian; Zhang, Zuojian; Li, Zhen; Jiang, Kui
2019-05-07
Source PublicationANALYTICAL CHEMISTRY
ISSN0003-2700
Volume91Issue:9Pages:5605-5612
AbstractExcited-state CH2Cl2-induced associative ionization (AI) is a newly developed ionization method that is very effective for oxygenated organics. However, this method is not widely known. In this study, an unprecedented ionization efficiency and ultrafast reaction rate of AI toward nitro compounds were observed. The ionization efficiencies of o-nitrotoluene (o-NT), m-nitrotoluene (m-NT), and nitrobenzene (NB) were as high as (28 +/- 3)%, (27 +/- 2)%, and (13 +/- reaction rate coefficients of these nitroaromatics were (0.5-1.3) X 10(-7) molecule(-1) cm(3) s(-1) (similar to 300 K). These unusual rate coefficients indicated strong long-range interactions between the two neutral reactants, which was regarded as a key factor leading to the ultrahigh ionization efficiency. The detection sensitivities of the nitroaromatics, (1.01-2.16) X 10(4) counts pptv(-1) in 10 s acquisition time, were obtained by an AI time-of-flight mass spectrometer (AI-TOFMS). These experimental results not only provide new insight into the AI reaction but also reveal an excellent ionization method that can improve the detection sensitivity of nitroaromatics to an unprecedented degree.
Department大气环境科学实验室
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/43138
Collection大气环境科学实验室
Affiliation1.Univ Chinese Acad Sci, Natl Engn Lab VOCs Pollut Control Mat & Technol, Beijing 101408, Peoples R China
2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Simulat & Pollut Control, Beijing 100085, Peoples R China
Recommended Citation
GB/T 7714
Huang, Jingyun,Yang, Bo,Shu, Jinian,et al. Kinetic Understanding of the Ultrahigh Ionization Efficiencies (up to 28%) of Excited-State CH2Cl2-Induced Associative Ionization: A Case Study with Nitro Compounds[J]. ANALYTICAL CHEMISTRY,2019,91(9):5605-5612.
APA Huang, Jingyun,Yang, Bo,Shu, Jinian,Zhang, Zuojian,Li, Zhen,&Jiang, Kui.(2019).Kinetic Understanding of the Ultrahigh Ionization Efficiencies (up to 28%) of Excited-State CH2Cl2-Induced Associative Ionization: A Case Study with Nitro Compounds.ANALYTICAL CHEMISTRY,91(9),5605-5612.
MLA Huang, Jingyun,et al."Kinetic Understanding of the Ultrahigh Ionization Efficiencies (up to 28%) of Excited-State CH2Cl2-Induced Associative Ionization: A Case Study with Nitro Compounds".ANALYTICAL CHEMISTRY 91.9(2019):5605-5612.
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