Development of Super Lewis Acid Chemistry Based on Two-Coordinate Boron Cation

2017 Fiscal Year Final Research Report

• Project/Area Number: 26708004
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Organic chemistry
• 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)
• Research Collaborator: FUKUSHIMA Takanori ; TANAKA Naoki ; HASHIZUME Daisuke
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: ホウ素 / ボリニウムイオン / ルイス酸 / 超ルイス酸 / 小分子活性化 / ホールドーピング / ナノカーボン / 薄膜材料

Outline of Final Research Achievements

In this study, we succeeded in the first isolation and large-scale synthesis of Mes2B+, which is a 2-coordinated boron cation (= borinium ion) bonded only with aromatic groups. This class of compound had been thought to be too unstable to isolate. By using Mes2B+, we developed a variety of unique small-molecule activation reactions including unprecedented C=O double bond cleavage reaction of carbon dioxide. Furthermore, we found that Mes2B+ serves as an excellent hole dopant for carbon nanotubes and transition metal dicarcoconide-based thin film materials. These findings will provide a foundation for a new "super Lewis acid molecule chemistry" based on isolatable super Lewis acid molecules.

Free Research Field

有機典型元素化学、超分子化学