Kinetic study of C1 criegee intermediate with diethylamine and ethylamine and their atmospheric implications

• Published in: Chemical physics letters 2023-12, Vol.832, p.140885, Article 140885
• Main Authors: Shi, Jiayu, Jiang, Haotian, Che, Li, Liu, Siyue, Chen, Yang, Yang, Xueming, Dong, Wenrui
• Format: Article
• Language: English
• ISSN: 0009-2614; 1873-4448
• DOI: 10.1016/j.cplett.2023.140885

[Display omitted] •Gas-phase kinetics of Criegee Intermediate CH2OO with diethylamine and ethylamine was investigated.•Temperature- and pressure-dependent rate coefficients were measured using a laser-induced fluorescence technique.•Atmospheric implications of CH2OO reaction with diethylamine and ethylamine were examined.•The diethylamine and Ethylamine removal rate from the troposphere by CH2OO and OH radicals was compared. This paper investigates the pressure and temperature-dependent kinetics of CH2OO reacting with diethylamine (DEA) and ethylamine (EA) using the OH laser-induced fluorescence method. Pressure independence was observed within the range of 5.4–75 Torr. The rate coefficients for these reactions at 298 K are (2.49 ± 0.39) × 10−11 and (8.14 ± 1.25) × 10−12 cm3 molecule−1 s−1. The activation energies, determined from experiments conducted between 283 and 328 K, are (−2.01 ± 0.08) and (−1.35 ± 0.02) kcal mol−1. These reactions may contribute to the degradation of DEA and EA under specific environmental conditions.