Products of the gas phase reactions of the OH radical with α‐ and β‐pinene in the presence of NO
Products of the gas phase reactions of the OH radical with α‐ and β‐pinene in the presence of NO
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DOI：
10.1029/98jd01676
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发表时间：
1998-10
影响因子：
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通讯作者：
S. M. Aschmann;Anni Reisseil;R. Atkinson;J. Arey
中科院分区：
文献类型：
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作者：
S. M. Aschmann;Anni Reisseil;R. Atkinson;J. Arey
用气相色谱和原位大气压电离质谱（API-MS）研究了NO存在下OH自由基与α-和β-蒎烯的气相反应产物。采用气相色谱-火焰离子化检测器和气相色谱-质谱联用技术对丙酮进行了鉴定和定量，α-蒎烯反应的丙酮生成率为0.110±0.027，β-蒎烯反应的丙酮生成率为0.085±0.018。丙酮是第一代产物，并且可能在1位的叔烯丙基C-H键的初始H原子提取后和/或在2位和3位的OH自由基加成后产生。利用API-MS和API-MS/MS分析，除了从α-蒎烯形成蒎醛和从β-蒎烯形成诺品酮之外，我们还观察到从α-和β-蒎烯分别形成分子量为215、231和184的羟基硝酸酯、二羟基硝酸酯和二羟基羰基产物。反应计划导致这些多功能的产品物种的形成，符合我们的理解的有机过氧和烷氧基自由基的大气化学，提出。
Products of the gas phase reactions of the OH radical with α- and β-pinene in the presence of NO have been investigated using gas chromatography and in situ atmospheric pressure ionization mass spectrometry (API-MS). Acetone was identified and quantified by gas chromatography with flame ionization detection and combined gas chromatography-mass spectrometry, with formation yields of 0.110±0.027 from the α-pinene reaction and 0.085±0.018 from the β-pinene reaction. Acetone is a first-generation product and may arise after initial H atom abstraction from the tertiary allylic C-H bond at the 1 position and/or after OH radical addition at the 2 and 3 positions. Using API-MS and API-MS/MS analyses, in addition to the formation of pinonaldehyde from α-pinene and nopinone from β-pinene, we have observed the formation of hydroxynitrates, dihydroxynitrates and dihydroxycarbonyl products of molecular weights 215, 231 and 184, respectively, from both α- and β-pinene. Reaction schemes leading to the formation of these multifunctional product species, consistent with our understanding of the atmospheric chemistry of organic peroxy and alkoxy radicals, are presented.