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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Halide affinity for the water-air interface in aqueous solutions of mixtures of sodium salts
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Halide affinity for the water-air interface in aqueous solutions of mixtures of sodium salts

机译:钠盐混合物水溶液中卤化物对水-空气界面的亲和力

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摘要

The water-air interface plays a critical role in many physical and chemical processes of the Earth's atmosphere. In particular, heavy halide ions are strongly involved in processes of fundamental importance in determining the prevalence of many atmospheric components through heterogeneous reactions at the water-air interface. In this work, molecular dynamics simulations are used to study the halide enhancements at the water-air interface in the case of mixtures of Cl~-, Br~-, and I- ions. The results show a pattern of enhancement directly correlated to the anion polarizability. This effect is explained in terms of the charge distribution across the slab resembling an electrical double layer. As a result, the anions with higher polarizability lower the system's potential energy by enhancing their presence at the interface.
机译:水-空气界面在地球大气的许多物理和化学过程中起着至关重要的作用。特别是,重卤化物离子通过水-空气界面处的异质反应,在确定许多大气成分的流行方面,与重要的过程密切相关。在这项工作中,使用分子动力学模拟研究在Cl〜-,Br〜-和I-离子混合的情况下水-空气界面处卤化物的增强。结果显示出增强模式与阴离子极化率直接相关。用类似于双电层的整个平板上的电荷分布来解释这种效果。结果,具有较高极化率的阴离子通过增强它们在界面处的存在而降低了系统的势能。

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