Detection and Analysis of Chemical Species at the Solution Surface by Photoelectron Emission Spectroscopy

光电子发射光谱法检测和分析溶液表面化学物质

• 批准号: 07554038
• 负责人: WATANABE Iwao
• 金额: $ 10.75万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07554038/
• 关键词: photoelectron emission spectroscopy; surface analysis; surface activity; solvation structure; vacuum ultraviolet spectroscopy; air; liquid interface; 液 界面

1. There exist almost no ways to analyze the solvation structures of molecules and ions at the air/solution interface. The present project aims to detect and analyze the surface species by photoelectron emission spectroscopy. It utilizes monochromatic 6-10eV photons to irradiate the surface and detects photoelectrons emitted from the solution surface. The threshold photon energy to produce the photoelectrons corresponds to the ionization potential of the surface species. From the ionization potential one is able to discuss the solvation structure and from the photoelectron current the surface concentration.2. Some tetraalkylammonium ions were used to segregate halide anions to the surface. The present technique successfully detected the surface accumulation of halide anions.3. The halide anions segregated to the surface by large tetraalkylammonuim cations have smaller ionization potentials compared to that of anions with surface inactive counter cations. Tetrabutylammonium iodide solution showed stepwise decrease of ionization potential with the increase of bulk concentration. This must be indicating the stepwise dehydration of iodide anion at the solution surface.

1.几乎没有方法来分析分子和离子在空气/溶液界面处的溶剂化结构。本计画旨在利用光电子发射光谱法来侦测及分析表面物种。它利用单色6- 10 eV光子照射表面，并检测从溶液表面发射的光电子。产生光电子的阈值光子能量对应于表面物质的电离势。从电离势可以讨论溶剂化结构，从光电子流可以讨论表面浓度.一些四烷基铵离子被用来隔离卤素阴离子的表面。该技术成功地检测了卤离子的表面积累.与具有表面非活性抗衡阳离子的阴离子相比，被大的四烷基铵阳离子分离到表面的卤素阴离子具有较小的电离电位。四丁基碘化铵溶液的电离电位随体积浓度的增加而逐步降低。这一定表明碘阴离子在溶液表面逐步脱水。

项目成果

Iwao Watanabe(共著): "Structure,Fluctuation,and Relaxation in Sulutions:Studies in Physical and Theoretical Chemistry 83" Elsevier,Amsterdam, 446 (1995)

Iwao Watanabe（合著者）：“解决方案中的结构、涨落和松弛：物理和理论化学研究 83”Elsevier，阿姆斯特丹，446 (1995)

Iwao Watanabe: "X-ray Absorption Spectroscopy of Liquid Surface." Rev.Sci.Instrum.68. 3307-3311 (1997)

Iwao Watanabe：“液体表面的 X 射线吸收光谱”。

柳瀬悦也: "大気圧Heイオン収量X線吸収微細構造法(XAFS)による薄膜試料の分析" 応用物理. 65・(12). 1267-1270 (1996)

Etsuya Yanase：“通过大气压He离子产量X射线吸收精细结构（XAFS）分析薄膜样品”应用物理65·（12）1267-1270（1996）。

Iwao Watanabe: "Coordination Structure of Zinc(II) lons on a Langmuir Monolayer,Observed by Total-Reflection X-ray Absorption Fine Structure." J.Am.Chem.Soc.119. 12018-12019 (1997)

Iwao Watanabe：“朗缪尔单层上锌 (II) 离子的配位结构，通过全反射 X 射线吸收精细结构观察到。”

Iwao Watanabe: "Dehydration of iodide segregated by tetraalkylammonium at the air/solution interface studied by photoelectron emission spectroscopy." Chem.Phys.Lett.(in press).

Iwao Watanabe：“通过光电子发射光谱研究空气/溶液界面处四烷基铵隔离的碘化物的脱水。”