2022 Fiscal Year Final Research Report
Reactions of Super Reductants and Oxidants Explored by Ultrafast Spectroscopy
| Project/Area Number |
19K21127
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| Project/Area Number (Other) |
18H05976 (2018)
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Multi-year Fund (2019)
Single-year Grants (2018) |
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| Review Section |
0501:Physical chemistry, functional solid state chemistry, organic chemistry, polymers, organic materials, biomolecular chemistry, and related fields
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| Research Institution | Osaka University (2018, 2020-2022)
Nagoya University (2019) |
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Principal Investigator |
LU CHAO 大阪大学, 産業科学研究所, 助教 (90828112)
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| Project Period (FY) |
2018-08-24 – 2023-03-31
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| Keywords | Excited Ions / Electron Transfer / Laser Flash Photolysis / Ultrafast Spectroscopy / Molecular Materials |
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| Outline of Final Research Achievements |
The achievements of this research are the clarification of excited-state dynamics and reaction mechanisms of novel excited ions, and the exploration of their application for various molecular systems to establish a new scientific field of super reductants and super oxidants.
Cycloparaphenylenes (CPPs) have attracted considerable attention because of their unique properties. The excited states of CPP2+ were investigated by transient absorption measurements. Naphthalenediimide (NDI) is among the most widely explored components for n-type materials. By applying femtosecond laser flash photolysis, an investigation was conducted to exhibit the electron transfer from excited NDI radical anion in intensely interacting molecules. Fullerene anions have attracted wide interest due to their relevant performances in organic devices. Thus, femtosecond transient absorption spectroscopy was employed to directly describe the excited states and photoinduced electron transfer of fullerene dianions.
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| Free Research Field |
Photochemistry
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| Academic Significance and Societal Importance of the Research Achievements |
This research focuses on the excited ions as the untapped novel energy precursors instead of the traditional excited neutral species. Reactions from the excited states of ions, which act as super redox reagents, were examined to uncover new pathways for harnessing sunlight in molecular devices.
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