Hyper‐Raman study of hydrated excess protons in water: Measurement of concentrated HCl solution
Hyper‐Raman study of hydrated excess protons in water: Measurement of concentrated HCl solution
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水中水合过量质子的超拉曼研究：浓 HCl 溶液的测量
DOI：
10.1002/jrs.6342
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发表时间：
2022
影响因子：
2.5
通讯作者：
Okuno Masanari
中科院分区：
文献类型：
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作者：
Inoue Kazuki;Okuno Masanari
我们首次报道了浓盐酸溶液的超拉曼（HR）光谱。从OH伸缩区域到低频区域的HR信号反映了在水中溶剂化的氯阴离子的存在。相比之下，事实证明HR光谱对水中过量质子的存在不敏感。HCl溶液的HR光谱没有显示出任何质子连续谱的特征，并且与IR光谱形成鲜明对比的是H2O弯曲模式的高/低频侧的肩部。此外，我们发现在532 nm激发的HR光谱中，在500 cm− 1附近出现了尖锐的HR信号。激光功率依赖性表明该信号来自光化学反应。在1064 nm HR激发和532 nm拉曼激发下不存在该信号表明共振（超）拉曼效应增强了来自光产物的信号。
We report hyper‐Raman (HR) spectra of concentrated hydrochloric acid solutions for the first time. HR signals from the OH stretching region to the low‐frequency region reflect the presence of chloride anions solvated in water. By contrast, it turns out that HR spectroscopy is insensitive to the presence of excess protons in water. HR spectra of HCl solutions do not show any signature of a proton continuum and shoulders on the high/low‐frequency sides of the bending mode of H2O in stark contrast to IR spectroscopy. Moreover, we found that a sharp HR signal around 500 cm−1appear in 532 nm excited HR spectra. A laser power dependence indicates that this signal comes from a photochemical reaction. The absence of this signal under 1064 nm HR excitation and 532 nm Raman excitation suggests that the resonance (hyper‐)Raman effect enhances the signal from the photoproduct.