2009 Fiscal Year Final Research Report
Glass transitions and low-frequency dynamics of room-temperature ionic liquids
| Project/Area Number |
17073004
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| Research Category |
Grant-in-Aid for Scientific Research on Priority Areas
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
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| Research Institution | The University of Tokyo |
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Principal Investigator |
YAMAMURO Osamu The University of Tokyo, 物性研究所, 准教授 (20200777)
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| Project Period (FY) |
2005 – 2009
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| Keywords | イオン液体 / ガラス転移 / ボゾンピーク / 熱容量 / 中性子散乱 / 階層構造 |
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| Research Abstract |
For the most typical ionic liquids, alkylimidazolium ionic liquids, we have found from the heat capacity measurements that the ionic liquids are realized for the cations with the alkyl-carbon number larger than 2 and exhibit glass transitions around 200K. From the neutron diffraction and quasielastic neutron scattering measurements, it was revealed that ionic liquids have domains and their motions are slower than 100ns. It is also shown that ionic liquids exhibit the ionic motions related to the glass transitions and the alkyl-chain motion with ps-order. It is summarized that ionic liquids have spatially and dynamically hierarchical structures.
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