2011 Fiscal Year Final Research Report
Development of time-and space-resolved low frequency Raman spectroscopy and elucidation of melting processes of ionic liquids
| Project/Area Number |
21245005
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Physical chemistry
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
IWATA Koichi 学習院大学, 理学部, 教授 (90232678)
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| Research Collaborator |
OKAJIMA Hajime 東京大学, 大学院・理学系研究科, 助教 (20582654)
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| Project Period (FY) |
2009 – 2011
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| Keywords | イオン液体 / 格子振動 / ラマン分光 / 融解過程 / 液体構造 / 分子温度 |
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| Research Abstract |
We developed a new low frequency Raman spectroscopy for elucidating melting processes of ionic liquids. It enables fast and simultaneous monitoring of various aspects of melting : increase of temperatures, loss of lattice vibrations, and intramolecular structure change. Several new phenomena are found,(1) a transient crystalline state existing at temperatures higher than the melting point,(2) delay of intramolecular conformational changes during the melting, and(3) thermal non-equilibration of anions and cations in an ionic liquid. The third result will lead to a new concept,"molecular temperature", which is useful for discussing thermal inhomogeneity of general liquids as well as ionic liquids.
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