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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Multiphase Chemistry of N_2O_5, ClNO_2, and BrNO_2
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Multiphase Chemistry of N_2O_5, ClNO_2, and BrNO_2

机译：N_2O_5，ClNO_2和BrNO_2的多相化学

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摘要

The uptake kinetics of N_2O_5 were studied with the droplet train technique as a function of temperature between 262 and 278 K on different aqueous solutions. No pronounced temperature dependence was observed, and the average uptake coefficient in this temperature range is 0.018 ± 0.003. When interacting with salt solutions (i.e., NaCl, NaBr, or NaI), N_2O_5 contributes to the formation of ClNO_2 and BrNO_2. The multiphase chemistry of these nitryl compounds was further investigated using the wetted-wall technique as a function of temperature between 275 and 293 K on different aqueous solutions. The uptake coefficients are reported for both species, and no distinct temperature dependence was observed. Their uptake rate was efficiently enhanced by the presence, in the aqueous phase, of halogenides ions. When reacting with Br~- or I~-, both nitryl compounds deliver to the gas phase the molecular form of the halogen, i.e., Br_2 or I_2. A reaction scheme potentially explaining these observations is presented and its importance for the sea-salt aerosol chemistry is discussed.
机译：在不同的水溶液中，采用液滴列技术研究了N_2O_5的吸收动力学随温度在262和278 K之间的变化。没有观察到明显的温度依赖性，并且在该温度范围内的平均吸收系数为0.018±0.003。当与盐溶液（即NaCl，NaBr或NaI）相互作用时，N_2O_5有助于ClNO_2和BrNO_2的形成。在不同的水溶液上，使用湿壁技术进一步研究了这些腈基化合物的多相化学性质，该温度是275至293 K之间的函数。报告了两种物种的吸收系数，未观察到明显的温度依赖性。通过在水相中存在卤化物离子，有效地提高了它们的吸收速率。当与Br-或I--反应时，两种硝酰基化合物都将卤素的分子形式即Br_2或I_2输送至气相。提出了可能解释这些发现的反应方案，并讨论了其对海盐气溶胶化学的重要性。

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