Removing gas-phase features in near ambient pressure partial Auger-Meitner electron yield oxygen K-edge NEXAFS spectra

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-04-01 DOI:10.1016/j.elspec.2023.147320

Thorsten Bartels-Rausch, Jérôme Philippe Gabathuler, Huanyu Yang, Yanisha Manoharan, Luca Artiglia, Markus Ammann

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Abstract

With the advent of ambient pressure X-ray excited electron spectroscopy, near-edge X-ray absorption fine structure spectroscopy is widely used to investigate the hydrogen-bonding environment in aqueous solutions, ice, and adsorbed water. When Auger-Meitner electrons are detected, the method becomes inherently surface-sensitive because of the limited escape depth of electrons. In such X-ray absorption experiments with aqueous samples, gas-phase water is inevitably present. It impacts the acquired spectra in two ways: (1) Absorption along the X-ray path upstream of the sample reduces the photon flux reaching the condensed phase. (2) Spectra originating from gas-phase water in front of the analyzer contribute to the recorded spectra. Here, we develop and discuss a procedure to disentangle the gas-phase and condensed-phase contribution in the acquired spectra. A novel approach to quantify and remove the gas-phase contribution allows receiving condensed-phase near-edge X-ray absorption fine structure spectra at high water vapor pressure free of gas-phase artifacts.

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去除近环境压力部分奥格-迈特纳电子产率氧k边NEXAFS谱中的气相特征

随着环境压力x射线激发电子能谱的出现，近边x射线吸收精细结构能谱被广泛用于研究水溶液、冰和吸附水中的氢键环境。当探测到奥格-迈特纳电子时，由于电子的逃逸深度有限，该方法具有固有的表面敏感性。在这种含水样品的x射线吸收实验中，气相水不可避免地存在。它从两个方面影响获得的光谱:(1)沿样品上游x射线路径的吸收减少了到达凝聚相的光子通量。(2)来自分析仪前气相水的光谱对记录的光谱有贡献。在这里，我们发展并讨论了一种程序来解开在获得的光谱中的气相和凝聚相的贡献。一种量化和去除气相贡献的新方法允许在高水蒸气压下接收无气相伪影的凝聚相近边x射线吸收精细结构光谱。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.