2020 Fiscal Year Final Research Report
Electronic structure characterization of non-aqueous solvents
| Project/Area Number |
18K14178
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 32010:Fundamental physical chemistry-related
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Keywords | electron spectroscopy / electronic structure / ionization energy / non-aqueous solvents |
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| Outline of Final Research Achievements |
Photoelectron spectroscopy was used to study the electronic structure of liquids, with focus on non-aqueous solvents. Photoelectron spectroscopy is able to directly reveal electrochemical properties, the chemical state and reaction products on a molecular scale, which is also crucial for understanding biological processes. However, the key is having robust reference data and the ability to measure accurate ionization energies.
A new energy-referencing method for obtaining accurate ionization energies was developed and applied to liquid water and alcohols. Here, the full valence band of ethanol and methanol was characterized for the first time. Furthermore, measurements of liquid ammonia have been made possible in international collaboration, which enabled first direct study of an insulator-to-metal transition in an alkali metal-ammonia solution. The gained knowledge was applied to study metallic water-solutions by forming a liquid water layer on a sodium-potassium droplet.
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| Free Research Field |
物理化学
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| Academic Significance and Societal Importance of the Research Achievements |
Important steps for photoelectron spectroscopy on liquids were achieved: Development of a new energy-referencing method for obtaining more accurate chemical properties, and establishing much-needed reference data for non-aqueous solvents, starting with the characterization of methanol and ethanol.
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