2016 Fiscal Year Final Research Report
Structure and Electronic State of Metal Complexes in Ionic Liquids Observed by Soft X-ray Spectroscopy
| Project/Area Number |
26410018
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Physical chemistry
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| Research Institution | Saga University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
TOKUSHIMA Takashi 理化学研究所, 放射光科学研究センター, 技師 (10415242)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | イミダゾリウム系イオン液体 / 分子性液体 / 遷移金属イオン / 錯形成平衡 / 水素結合 / 軟X線吸収分光法 / 軟X線発光分光法 / 電子構造 |
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| Outline of Final Research Achievements |
The complex formation of Ni(II) with dimethyl sulfoxide (DMSO), methanol (MeOH), and acetonitrile (AN) was observed in ionic liquids. Moreover, the interactions between ionic liquids and molecular liquids were clarified using IR, Raman, and NMR techniques. To elucidate the changes in the electronic structures of ionic liquids by complex formation, soft X-ray absorption and emission (XAS and XES) spectroscopic experiments were performed on the N K-edge of ionic liquids. The stability constants of the Ni(II) complex were higher in the order of DMSO >> AN > MeOH. Thus, the hydrogen bonding between the imidazolium ring and molecular liquids may not markedly affect the complex formation. The electronic structure of the N atoms within ionic liquid may not be strongly influenced by the interaction between the cation and anion of ionic liquids. It is shown that the interaction between both ions is very weak.
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| Free Research Field |
溶液化学
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