水的拉曼散射和固体-水相互作用产生的污染物的光致发光
Raman Scattering of Water and Photoluminescence of Pollutants Arising from Solid-Water Interaction
摘要：
系统的拉曼实验上进行的水和水-乙醇样品，存储在不同的容器（熔融石英，聚丙烯，钠钙玻璃III型）几个小时，已经表明，发光的拉曼信号波动的贡献是直接相关的容器组成。强度波动高达98%，已被观察到在对应于水分子内和分子间振动的光谱区域，尽管事实上，模式的波数保持不变。毫无疑问，我们将这些波动归因于发光现象，其基础是：i）在反斯托克斯域中不存在这种效应，ii）其对激发激光波长的依赖性，iii）其他相关的光致发光实验。这种发光归因于来自不同容器的超低浓度污染物。
英文摘要：
Systematic Raman experiments performed on water and water-ethanol samples, stored in different containers (fused silica, polypropylene, soda-lime glass type III) for several hours, have shown that the luminescence contribution to the Raman signal fluctuations is directly related to the container composition. Intensity fluctuations as large as 98%, have been observed in the spectral regions corresponding to the both water intramolecular and intermolecular vibrations, despite the fact that the wavenumbers of the modes remained unchanged. We undoubtedly attribute these fluctuations to a luminescence phenomenon on the basis of : i) the absence of such effect in the anti-Stokes domain, ii) its dependence on the excitation laser wavelength, iii) other relevant photoluminescence experiments. This luminescence is attributed to pollutants at ultra-low concentration coming from the different containers.
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