2022 Fiscal Year Final Research Report
Development of the synthesis of heteroatom-bridged planar triphenylboranes and its host derivatives and their function
| Project/Area Number |
20K15253
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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 33010:Structural organic chemistry and physical organic chemistry-related
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | プラナートリフェニルボラン / 芳香族求核置換反応 / ルイス酸 / センシング / 固体電解質 / リチウムイオン伝導率 / ボレート錯体 |
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| Outline of Final Research Achievements |
Triarylboranes are important molecules in functional materials due to their high electron-accepting properties originating from the boron atom. Recently, we have succeeded in the synthesis of a planar triphenylborane, in which the three phenyl groups are bridged at the ortho positions by oxygen atoms. The molecule is stable under ambient conditions (e.g., air, moisture) without introducing bulky substituents unlike conventional trimesitylborane. In this study, we have developed the synthesis of planar triphenylboranes bridged by two oxo groups and an alkylimino, arylimino, or imino group. We also found that they form borate complexes with halide ions and molecular ions, and Li-solid electrolytes prepared from the planar triphenylboranes and Li-salts exhibited conductivities over 0.001 S/cm.
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| Free Research Field |
有機合成化学，典型元素化学，有機材料化学
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| Academic Significance and Societal Importance of the Research Achievements |
トリアリールボラン類は，センシング材料や有機電子材料など幅広い機能性材料に電子受容性を付与する特性を有している．本研究で確立した合成法は，立体保護を施したトリアリールボランの利用という従来の制限を解消するものであり，含ホウ素機能性材料の発展に寄与するものと考えられる．また，本研究で明らかにしたプラナートリフェニルボランのユニークなボラート錯形成能は，錯形成を機能発現の鍵とするセンシングやイオン伝導体などの様々な分野に新たな選択肢を与えるものであり，今後の研究を通じて固体電解質などの高機能化への貢献が期待できる．
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