2020 Fiscal Year Final Research Report
Bottom-up Synthesis of n-Type Semiconductive Non-planar Nanographenes
Project/Area Number |
19K22112
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Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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Allocation Type | Multi-year Fund |
Review Section |
Medium-sized Section 28:Nano/micro science and related fields
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Research Institution | Nara Institute of Science and Technology |
Principal Investigator |
Aratani Naoki 奈良先端科学技術大学院大学, 先端科学技術研究科, 准教授 (60372562)
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Project Period (FY) |
2019-06-28 – 2021-03-31
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Keywords | 有機化学 / 複合材料 / アセン / 有機半導体 / ナノグラフェン |
Outline of Final Research Achievements |
We have been working on the functionalization of polycyclic aromatic hydrocarbons (PAHs) by introducing substituents. In this research project, we have achieved the creation of curved π-conjugated systems as fullerene expansion diagrams by π-extension of the curved π-conjugated system, corannulene, as originally intended. Specifically, we succeeded in controlling the absorption spectrum and the fluorescence quantum yield by expanding 10 carbons from corannulene, and by expanding 20 carbons from corannulene. We found charge-transfer type absorption and fluorescence spectra, which are not seen in the case of corannulene alone. In particular, the latter is a property that has been overlooked in conventional π-conjugated compounds, and is a discovery that will have a major impact on future molecular design.
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Free Research Field |
有機合成
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Academic Significance and Societal Importance of the Research Achievements |
良く電流を流す有機物は溶けにくい、という化学の常識に挑戦し、研究期間全体を通して、非常にシンプルな炭素シート状化合物の分子設計から様々な特性を引き出すことができた。本研究では、炭素シートを曲げることで溶解性が向上することに着目し、効果的に5員環を導入することで曲面と電子受容性を同時に獲得する戦略に基づき、ボウル型分子であるコラニュレンの縮環多量体の合成により、新規有機n型半導体化合物群の開発に成功した。
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