| 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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| Project Status |
Completed (Fiscal Year 2022)
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| Budget Amount *help |
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | Excited Ions / Electron Transfer / Laser Flash Photolysis / Ultrafast Spectroscopy / Molecular Materials / Physical Chemistry / Photochemistry / Laser Flash Phtolysis |
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| Outline of Research at the Start |
In the current research, the following studies are included: (1) development of novel super reductants and super oxidants, (2) characterization of excited radical ions in molecular assembled systems, and (3) application of excited radical ions/excited divalent ions for various materials. The outlines of this research are the clarification of excited-state dynamics and reaction mechanisms of excited radical ions/excited divalent ions and the exploration of their application for various redox systems to establish a new science field of super reductants and super oxidants.
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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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| 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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