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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Products of the gas-phase reactions of OH radicals with (C2H5O)(2)P(S)CH3 and (C2H5O)(3)PS
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Products of the gas-phase reactions of OH radicals with (C2H5O)(2)P(S)CH3 and (C2H5O)(3)PS

机译：OH自由基与（C2H5O）（2）P（S）CH3和（C2H5O）（3）PS的气相反应产物

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摘要

Products of the gas-phase reactions of OH radicals with O,O-diethyl methylphosphonothioate [(C2H5O)(2)P(S)CH3, DEMPT] and O,O,O-triethyl phosphorothioate [(C2H5O)(3)PS, TEPT] have been investigated at room temperature and atmospheric pressure of air using in situ atmospheric pressure ionization mass spectrometry (API-MS) and, for the TEPT reaction, gas chromatography and in situ Fourier transform infrared (FT-IR) spectroscopy. Combined with products quantified previously by gas chromatography, the products observed were: from the DEMPT reaction, (C2H5O)(2)P(O)CH3 (21 +/- 4% yield) and C2H5OP(S)(CH3)OH or C2H5OP(O)(CH3)SH (presumed to be C2H5OP(O)(CH3)SH by analogy with the TEPT reaction); and from the TEPT reaction, (C2H5O)(3)PO (54-62% yield), SO2 (67 +/- 10% yield), CH3CHO (22-40% yield) and, tentatively, (C2H5O)(2)P(O)SH. The FT-IR analyses showed that the formation yields of HCHO, CO, CO2, peroxyacetyl nitrate [CH3C(O)OONO2], organic nitrates, and acetates from the TEPT reaction were < 5%, 3 +/- 1%, < 7%, < 2%, 5 +/- 3%, and 3 +/- 2%, respectively. Possible reaction mechanisms are discussed.
机译：OH自由基与O，O-二乙基甲基硫代磷酸酯[（C2H5O）（2）P（S）CH3，DEMPT]和O，O，O-三乙基硫代磷酸酯[（C2H5O）（3）PS的气相反应产物[TEPT]已在室温和大气压下使用原位大气压电离质谱（API-MS）进行了研究，对于TEPT反应，还采用了气相色谱和原位傅里叶变换红外（FT-IR）光谱技术。结合先前通过气相色谱定量的产物，观察到的产物为：通过DEMPT反应，（C2H5O）（2）P（O）CH3（21 +/- 4％产率）和C2H5OP（S）（CH3）OH或C2H5OP （O）（CH3）SH（与TEPT反应类似推定为C2H5OP（O）（CH3）SH）;以及来自TEPT反应的（C2H5O）（3）PO（54-62％产率），SO2（67 +/- 10％产率），CH3CHO（22-40％产率）和（C2H5O）（2）暂定P（O）SH FT-IR分析表明，TEPT反应生成的HCHO，CO，CO2，过氧乙酰硝酸盐[CH3C（O）OONO2]，有机硝酸盐和乙酸盐的形成率<5％，3 +/- 1％，<7 ％，<2％，5 +/- 3％和3 +/- 2％。讨论了可能的反应机理。

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