Gas-Phase Rate Coefficient of OH + 1,2-Epoxybutane Determined between 220 and 950 K
نویسندگان
چکیده
Epoxides have many primary and secondary atmospheric sources. As with other oxygenates, they exhibit a complex temperature-dependent reaction OH, whose full description is necessary in order to understand their interactions combustion environments. We measured the kinetics of title using two complementary absolute methods: pulsed-laser photolysis–laser-induced fluorescence (PLP–LIF) discharge-flow mass spectrometric system (DF-MS), both monitoring temporal decays OH. In addition, relative methods employing DF-MS as function temperature well several simulation chamber experiments at room were performed. A very weak negative dependence was observed T ≤ 285 K, only through combination precise data large range we able discern transition toward positive found ≥ 295 K. The non-Arrhenius OH + 1,2-epoxybutane implies agency prereactive complexes this mechanism, albeit smaller effect than that its acyclic ether analogues. This will implications for understanding chemical fate epoxides within oxidizing
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ژورنال
عنوان ژورنال: ACS earth and space chemistry
سال: 2021
ISSN: ['2472-3452']
DOI: https://doi.org/10.1021/acsearthspacechem.1c00050