A discharge-flow study of the kinetics of the reactions of IO with CH3O2 and CF3O2.
A discharge-flow study of the kinetics of the reactions of IO with CH3O2 and CF3O2.
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DOI：
10.1039/b501903f
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发表时间：
2005-05
期刊：
影响因子：
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通讯作者：
C. Bale;C. E. Canosa-mas;D. Shallcross;R. Wayne
中科院分区：
文献类型：
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作者：
C. Bale;C. E. Canosa-mas;D. Shallcross;R. Wayne
我们使用配备离轴腔增强吸收光谱 (CEAS) 的放电流管来检测 IO，确定了反应 IO + CH3O2 --> 产品 (1) 和 IO + CF3O2 --> 产品 (2) 的速率常数。用 NO 滴定 RO2 产生的 NO2 也可以使用 CEAS 系统进行检测。获得的速率常数为 k1 = (6.0 +/- 1.3) x 10(-11) cm3 分子(-1) s(-1) 和 k2 = (3.7 +/- 0.9) x 10(-11) cm3 分子(-1) s(-1)，T = 295 +/- 2 K 和 P = 2.5 +/- 0.3 Torr；这是这些速率常数的首次测定。讨论了反应（1）的可能产物和对大气的影响。
We have determined the rate constants for the reactions IO + CH3O2 --> Products (1) and IO + CF3O2 --> Products (2) using a discharge-flow tube equipped with off-axis cavity-enhanced absorption spectroscopy (CEAS) for the detection of IO. NO2, produced from the titration of RO2 with NO, was also detected using the CEAS system. The rate constants obtained were k1 = (6.0 +/- 1.3) x 10(-11) cm3 molecule(-1) s(-1) and k2 = (3.7 +/- 0.9) x 10(-11) cm3 molecule(-1) s(-1) at T = 295 +/- 2 K and P = 2.5 +/- 0.3 Torr; this is the first determination of these rate constants. The possible products and the atmospheric implications of reaction (1) are discussed.