Investigation of an interplay between boron and pi-conjugated systems for the development of functional material

2022 Fiscal Year Final Research Report

• Project/Area Number: 20H02722
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 33010:Structural organic chemistry and physical organic chemistry-related
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: Shoji Yoshiaki 東京工業大学, 科学技術創成研究院, 准教授 (40525573)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: ホウ素 / 空軌道 / ルイス酸 / 発光特性 / 有機デバイス / 有機変換反応 / 非共有結合性相互作用

Outline of Final Research Achievements

We have investigated structures and properties of organoboron compounds in which boron vacant orbitals are integrated in various ways. We have found that (1) a diboron compound with two neighboring vacant orbitals exhibit dual fluorescence and environmental response properties due to the change in relative angles between the vacant orbitals, (2) boron-containing π-conjugated macrocycles exhibit a strong boron-olefin proximity interaction beyond van der Waals force, (3) a newly developed diborylacetylene derivative if useful for the synthesis of densely boron-containing materials, (4) boron- and nitrogen-containing heterocyclic compounds that are isoelectronic with anti-aromatic hydrocarbons show unique electronic properties.

Free Research Field

有機元素化学

Academic Significance and Societal Importance of the Research Achievements

本研究において、炭素π電子系に対してホウ素原子を組み込んだ化合物の開発を通じて、ホウ素がもつ空軌道とπ電子系との相互作用に基づく多彩な機能発現が可能であることを明らかにした。本研究で得られた学術的な成果は、今後、新しい物質変換反応や有機デバイス開発を含む新機能物質開発において基礎・応用の両面で有用な知見を提供するものと考えられる。