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首页> 外文期刊>The Journal of Chemical Physics >PHOTOELECTRON SPECTROSCOPY OF LIQUID WATER, SOME ALCOHOLS, AND PURE NONANE IN FREE MICRO JETS
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PHOTOELECTRON SPECTROSCOPY OF LIQUID WATER, SOME ALCOHOLS, AND PURE NONANE IN FREE MICRO JETS

机译：游离微射束中液态水，某些醇和纯壬烷的光电子能谱

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The recently developed technique of accessing volatile liquids in a high vacuum environment by using a very thin liquid jet is implemented to carry out the first measurements of photoelectron spectra of pure liquid water, methanol, ethanol, 1-propanol, 1-butanol, and benzyl alcohol as well as of liquid n-nonane. The apparatus, which consists of a commercial hemispherical (10 cm mean radius) electron analyzer and a hollow cathode discharge He I right source is described in detail and the problems of the sampling of the photoelectrons in such an environment are discussed. For water and most of the alcohols up to six different electronic bands could be resolved. The spectra of 1-butanol and n-nonane show two weakly discernable peaks from which the threshold ionization potential could be determined. A deconvolution of the photoelectron spectra is used to extract ionization potentials of individual molecular bands of molecules near the surface of the liquid and shifts of the order of 1 eV compared to the gas phase are observed. A molecular orientation for water molecules at the surface of liquid water is inferred from a comparison of the relative band strengths with the gas phase. Similar effects are also observed for some of the alcohols. The results are discussed in term of a simple ''Born-solvation'' model. (C) 1997 American Institute of Physics. [References: 72]
机译：通过使用非常薄的液体射流，在高真空环境中获取挥发性液体的最新开发技术得以实施，以进行纯净水，甲醇，乙醇，1-丙醇，1-丁醇和苄基化合物的光电子光谱的首次测量。酒精以及液态正壬烷。详细描述了该设备，该设备由商用半球形（平均半径为10 cm的）电子分析仪和空心阴极放电He I右源组成，并讨论了在这种环境下光电子采样的问题。对于水和大多数酒精，最多可以解析六个不同的电子波段。 1-丁醇和正壬烷的光谱显示了两个弱可辨别的峰，可从中确定阈值电离势。使用光电子能谱的去卷积来提取靠近液体表面的分子的各个分子带的电离电势，并且观察到与气相相比大约发生了1 eV的位移。从相对带强度与气相的比较中推断出液态水表面上水分子的分子取向。对于某些醇也观察到类似的效果。以简单的“出生-解决”模型来讨论结果。 （C）1997美国物理研究所。 [参考：72]

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