2012 Fiscal Year Final Research Report
Innovative Development of Material Science with Ultra-Sensitive Calorimetory
| Project/Area Number |
21245003
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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 | Chiba University |
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Principal Investigator |
NISHIKAWA Keiko 千葉大学, 大学院・融合科学研究科, 教授 (60080470)
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| Co-Investigator(Renkei-kenkyūsha) |
MORITA Takeshi 千葉大学, 大学院・融合科学研究科, 助教 (80332633)
TOZAKI Ken-ichi 千葉大学, 教育学部, 教授 (30102031)
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| Project Period (FY) |
2009 – 2012
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| Keywords | 相転移 / 構造緩和 / 緩和時間 / ゆらぎ / ダイナミクス / 超高感度熱量計 / Raman散乱 / 核磁気共鳴 |
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| Research Abstract |
The main samples and phenomena of this study are phase behabiors of room-temperature ionic liquids (RTILs). RTILs constitute a new class of liquids that attract much attention because of their characteristic properties and potential utilities as functional liquids. Unique properties are remarkably manifested in their thermal behaviors such as low melting point despite being salts, hardness in crystallization, premelting over a wide temperature range, excessive supercooling, and the existence of complex thermal histories. We performed the measurements of calorimetories using ultra-sensitive calorimeters, Raman scattering and relaxation times of NMR. From these experiments, we found peculiar thermal behaviours at the phase changes of RTILs, namely ‘rhythmic melting and crystallization', ‘intermittent crystallization' in the premelting regions and ultraslow phase changes. These unique thermal behaviours of imidazolium-based RTILs are attributed to conformational changes and flexibility of constituent ions.
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[Book] 編著丸善2012
Author(s)
西川恵子,大内幸雄,伊藤敏幸,渡邉正義大野弘幸
Total Pages
374
Publisher
イオン液体の科学-新世代液体への挑戦-
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