Physical Chemistry of lonic Liquids

离子液体的物理化学

• 批准号: 12440159
• 负责人: HAMAGUCHI Hiro-o
• 金额: $ 9.41万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12440159/
• 关键词: ionic Liquid; solvent; structure; photoisomerization; trans-stilbene

Three different ionic-liquids have been synthesized; [bmim]PF_6, [bmim]BF_4, and [bmim](CF_3SO_2)_2N, where [bimim] stands for the butyhiiethylimidazolium ion. The structure of those ionic liquids has been studied by infrared and Raman spectroscopy; It has been elucidated that the [bmim] cation m [bmim]PF_6 and [bmim]BF_4 takes the same structure including the conformation of the pentyl group. The PF_6 anion in [bmim]PF_6 has been found to retain its octahedral symmetry, but its, site in [bmim]PF_6 is somewhat lower than O_h. The photophysics and photochemistry in ionic liquids have been studied by time-resolved fluorescence spectroscopy. It has been found that trans to cis isomerization of stilbene proceeds in [bmim]PF_6 even if its viscosity is about two orders of magnitude larger than that of ordinary organic solvents. This result indicates that viscosity is not a good measure of the property of an ionic liquid as a solvent.

合成了三种不同的离子液体：[bmim]PF_6，[bmim]BF_4和[bmim]（CF_3SO_2）_2N，其中[bmim]代表丁基三乙基咪唑离子。用红外光谱和拉曼光谱研究了这些离子液体的结构，证实了[bmim]阳离子m [bmim]PF_6和[bmim]BF_4具有相同的结构，包括戊基的构象。[bmim]PF_6中的PF_6阴离子仍保持八面体对称性，但它的位置比O_h稍低。用时间分辨荧光光谱法研究了离子液体中的光物理和光化学。发现在[bmim]PF_6中，即使粘度比普通有机溶剂大两个数量级，二苯乙烯也能发生顺反异构化。该结果表明粘度不是离子液体作为溶剂的性质的良好量度。

项目成果

Hironori Ishikawa, Koichi Iwata, Hiro-o Hamaguchi: "Picosecond Dynamics of Stepwise Double Proton Transfer Reaction in the Excited State of the 2-aminopyridine/Acetic acid System"Journal of Physical Chemistry. (in press). (2002)

Hironori Ishikawa、Koichi Iwata、Hiro-o Hamaguchi：“2-氨基吡啶/乙酸体系激发态下逐步双质子转移反应的皮秒动力学”物理化学杂志。

Shingo Ikeda,Shigeru Murata,Kunihiko Ishii,and Hiro-o Hamaguchi: "Mechanistic Studies of Pyrene-sensitized Photodecomposition of N-Phenylglycine : Acceleration of the Photodecomposition by the Addition of an Electron Acceptor"Bull.Chem.Society Japan. 73・1

Shingo Ikeda、Shigeru Murata、Kunihiko Ishii 和 Hiro-o Hamaguchi：“N-苯基甘氨酸的芘敏化光分解的机理研究：通过添加电子受体加速光分解”Bull.Chem.Society Japan 73・1。

Yuika Saito,Taka-aki Ishibashi,and Hiro-o Hamaguchi: "Polarization-resolved Coherent Anti-Stokes Raman Scattering (CARS) Spectroscopy : A New Probe of Molecular Symmentry through Accurate Determination of Raman Depolarization Ratio"Journal of Raman Spectr

Yuika Saito、Taka-aki Ishibashi 和 Hiro-o Hamaguchi：“偏振分辨相干反斯托克斯拉曼散射 (CARS) 光谱：通过准确测定拉曼去偏振比进行分子对称的新探针”拉曼光谱杂志

Anunay samanta, Satyen Saha,Hironori Ishikawa and Hiro-o Hamaguchi: "Excited State Structure of N-(4-cyanophenyI) carthazole by Time-Resolved Infrared Absorption Spectroscoppy"Chemistry Letters. (in press).

Anunay samanta、Satyen Saha、Hironori Ishikawa 和 Hiro-o Hamaguchi：“通过时间分辨红外吸收光谱法观察 N-(4-cyanophenyI) carthazillo 的激发态结构”化学快报。

Young-Kun Min, Hirotsugu Hiramatsu, and Hiro-o Hamaguchi: "Infrared Electroabsorption Spectroscopic Study of Association Structures of 5CB in the Solution, Isotropic Liquid and Nematic Liquid Crystal States"Chemistry Letters. 68-69 (2002)

Young-Kun Min、Hirotsugu Hiramatsu 和 Hiro-o Hamaguchi：“溶液、各向同性液体和向列液晶态中 5CB 缔合结构的红外电吸收光谱研究”化学快报。