Total-reflection XAFS of metal complex adsorbed at liquid-liquid interface

液-液界面吸附金属配合物的全反射XAFS

• 批准号: 18550087
• 负责人: TANIDA Hajime
• 金额: $ 2.44万
• 依托单位: Japan Synchrotron Radiation Research Institute
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18550087/
• 关键词: liquid-liquid interface; total-reflection; XAFS; surfactant; bromide ion; concentration; hydration structure; 界面物性; X線

The liquid-liquid interface between two immiscible solutions is an important two-dimensional reaction field used in a separation science and synthesis of thin-layer materials, and also as a model of biomembrane. The structure analysis of the interfacial species is very important to understand an adsorption and heterogeneous reaction mechanisms. The coordination structure of the interfacial species, however, has not been studied in detail, because of the lack of a suitable technique. Total-reflection X-ray spectroscopic technique was developed to the liquid-liquid interface. The X-ray absorption fine structure(XAFS) spectrum of bromide ion at the heptane-water interface was successfully obtained in the fluorescence mode. The spectra at the Br K-edge for bromide ions concentrated at the heptane-water interface was observed in the presence of cationic surfactants such as dimethyldipalmitylammonium, dimethyldilaurylammonium and, stearyltrimethylammonium jons. A significant difference of spectra at the heptane-water interfaces in the presence of catonic surfactants demonstrated that the hydration structure of Br-with cationic surfactants at the heptane-water interface was different from neat interfaces or bulk water phases. The spectrum at the Zn K-edge for zinc ions at heptane-water interface was also observed. The zinc ion was concentrated at the interface in the presence of stearic acid. The new method will lead to in situ study the interfacial concentration profile and the coordination structure of interfacial species. Further improvements and applications to metal ions and metal complexes in various liquid-liquid systems are also going on.

两种不互溶溶液的液-液界面是分离科学、薄层材料合成和生物膜模型中重要的二维反应场。界面物种的结构分析对于理解吸附和多相反应机理是非常重要的。然而，由于缺乏合适的技术，界面物种的配位结构还没有被详细研究。将全反射X射线光谱技术发展到液-液界面。在荧光模式下成功地获得了溴离子在庚烷-水界面的X射线吸收精细结构谱。在二甲基二棕榈基铵、二甲基二月桂基铵和硬脂基三甲基铵容斯等阳离子表面活性剂存在下，观察到溴离子在庚烷-水界面处的Br K边光谱。正离子表面活性剂存在下，Br-在庚烷-水界面上的水化结构与纯界面或本体水相不同。在庚烷-水界面上的锌离子的锌K边的光谱也被观察到。在硬脂酸存在下，锌离子在界面处富集。新方法将导致原位研究界面浓度分布和界面物种的配位结构。金属离子和金属配合物在各种液-液体系中的进一步改进和应用也在进行中。

项目成果

液液界面における全反射XAFS法の開発

液-液界面全反射XAFS方法的发展

• 发表时间: 2007
• 作者: 谷田 肇;永谷広久;原田誠
• 通讯作者: 原田誠

Development of the total-reflection XAFS at the liquid-loquid Interface

液-液界面全反射 XAFS 的开发

• 发表时间: 2007
• 作者: Hajime Tanida;Hirohisa Nagatani and Makoto Harada
• 通讯作者: Hirohisa Nagatani and Makoto Harada

Development of the total-reflection XAFS method for the liquid-liquid interface

液-液界面全反射 XAFS 方法的开发

• 发表时间: 2007
• 期刊: Journal of Physics : Conference Series 83
• 作者: Hajime Tanida;Hirohisa Nagatani and Makoto Harada.
• 通讯作者: Hirohisa Nagatani and Makoto Harada.

Study on Soft-Interface by XAFS

XAFS软接口研究

• 发表时间: 2007
• 作者: Makoto Harada;Hirohisa Nagatani and Hajime Tanida.;Hajime Tanida.
• 通讯作者: Hajime Tanida.

Development of the total-reflection XAFS method for the liquid-liquid in terface

液-液界面全反射XAFS方法的发展

• 发表时间: 2007
• 期刊: Journal of Physics:Conference Series 83
• 作者: 神田栄司;西山 豊;Hajime Tanida
• 通讯作者: Hajime Tanida