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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Solvation structures of iodide on and below a surface of aqueous solution studied by photodetachment spectroscopy
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Solvation structures of iodide on and below a surface of aqueous solution studied by photodetachment spectroscopy

机译：用光解光谱法研究水溶液表面上下的碘化物的溶剂化结构

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摘要

We investigated solvation structures of I- on and below a surface of an aqueous solution by photodetachment spectroscopy. An aqueous solution of an alkali halide was introduced to the vacuum as a continuous liquid flow (liquid beam), and the liquid beam was irradiated with a UV laser pulse. The intensity of electrons emitted from the surface by the laser excitation was measured as a function of wavelength (photodetachment spectroscopy), and we obtained absorption spectrum of I- on and below the solution surface. From the absorption spectrum, we found that I- starts to appear on the solution surface as the bulk NaI concentration increases. Similar concentration dependence was observed for the KI solution. We also found that I- located inside the solution is pushed to the surface, when NaCl is added to the solution. These changes are explained in terms of the difference in the polarizability of halide ions.
机译：我们通过光解光谱法研究了水溶液表面上和下方的I-的溶剂化结构。将碱金属卤化物的水溶液作为连续的液体流（液体束）引入真空中，并用UV激光脉冲照射该液体束。测量通过激光激发从表面发射的电子的强度与波长的关系（光解光谱法），我们获得了溶液表面上下的I-吸收光谱。从吸收光谱中，我们发现随着NaI总体浓度的增加，I-开始出现在溶液表面。对于KI溶液，观察到相似的浓度依赖性。我们还发现，当将NaCl添加到溶液中时，位于溶液内部的I-被推到表面。这些变化是根据卤化物离子极化率的差异来解释的。

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