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Intermolecular interactions for polarizability and dipole moment in ionic liquid: To construct solution theory including ionic liquid

离子液体中极化率和偶极矩的分子间相互作用：构建包括离子液体的溶液理论

基本信息

批准号：
21685001
负责人：
SHIROTA Hideaki
金额：
$ 17.72万
依托单位：
Chiba University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Young Scientists (A)
财政年份：
2009
资助国家：
日本
起止时间：
2009 至 2012
项目状态：
已结题

项目摘要

The aim of this reserach project includes understanding the microscopic intermolecular interaction and structure of ionic liquid through the intermolecular vibration. Since the intermolecular vibrational band in condensed phases appears in the low-frequency region below 50 cm-1, low-frequency spectroscopic techniques are essential to observe the intermolecular vibrations. In this project, it is successful to build a very high spec femtosecond Raman-induced Kerr effect spectroscopy setup as a single light source apparatus which has a wide observable frequency region and high signal to noise ratio. Using this spectroscopy setup, we successfully reveal the unique natures of the intermolecular vibrational band of ionic liquid at molecular level: (1) similarity/difference between aromatic and nonaromatic ionic liquids, (2) generality of heavy atom substitution (cation vs. anion and aromatic vs. nonaromatic), (3) similarity/difference between ionic liquid and (neutral) molecular liquid, and (4) dicationic vs. monocationic ionic liquids These results have been summarized in a book chapter (Ionic Liquids: Theory, Properties, New Approaches, Chapter 9) and a review article (ChemPhysChem, 2012, 13, 1638: classified as VIP (Very Important Paper)). Also, we have started some collaboration works with domestic and international groups through this research project.

本研究的目的是通过分子间振动来理解离子液体的微观分子间相互作用和结构。由于凝聚相中的分子间振动带出现在50 cm-1以下的低频区，因此低频光谱技术对于观察分子间振动是必不可少的。在这个项目中，成功地建立了一个非常高光谱规格的飞秒喇曼诱导克尔效应光谱装置，作为一个单光源装置，具有宽的可观测频率范围和高信噪比。利用这个光谱装置，我们成功地在分子水平上揭示了离子液体分子间振动带的独特性质：(1)芳香族和非芳香族离子液体之间的相似/不同，(2)重原子取代(阳离子与阴离子和芳香族与非芳香族)的共性，(3)离子液体与(中性)分子液体之间的相似/不同，以及(4)阳离子与单阳离子液体。这些结果已总结在一本书的章节(离子液体：理论，性质，新方法，第9章)和一篇综述文章(ChemPhysChem，2012，13,1638：归类为VIP(非常重要的论文))中。此外，我们还通过这一研究项目与国内外团体展开了一些合作工作。