Spectroscopic evidence for the specific Na+ and K+ interactions with the hydrogen-bonded water molecules at the electrolyte aqueous solution surfaces
Spectroscopic evidence for the specific Na+ and K+ interactions with the hydrogen-bonded water molecules at the electrolyte aqueous solution surfaces
复制标题
Na 和 K 与电解质水溶液表面氢键水分子特定相互作用的光谱证据
DOI：
10.1063/1.3104610
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发表时间：
2009-04-07
影响因子：
4.4
通讯作者：
Wang, Hong-fei
中科院分区：
文献类型：
--
作者：
Feng, Ran-ran;Bian, Hong-tao;Wang, Hong-fei
水分子在NaF和KF水溶液表面的和频振动光谱显示出明显不同的光谱特征和不同的浓度依赖性。这一结果是第一次直接观察到的简单的碱金属阳离子，这被认为是从水的表面耗尽，在电解质溶液表面的水分子的氢键结构的阳离子效应。这些观测结果可能为理解空气/水界面离子的基本现象提供重要线索。
Sum frequency generation vibrational spectra of the water molecules at the NaF and KF aqueous solution surfaces showed significantly different spectral features and different concentration dependence. This result is the first direct observation of the cation effects of the simple alkali cations, which have been believed to be depleted from the aqueous surface, on the hydrogen bonding structure of the water molecules at the electrolyte solution surfaces. These observations may provide important clues to understand the fundamental phenomenon of ions at the air/water interface.