Synthesis of polycatenanes using equilibrium reactions with cyclic structure and supramolecular interactions

2022 Fiscal Year Final Research Report

• Project/Area Number: 21K18996
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 35:Polymers, organic materials, and related fields
• Research Institution: Chiba University (2022); Tokyo Institute of Technology (2021)
• Principal Investigator: Aoki Daisuke 千葉大学, 大学院工学研究院, 准教授 (80736950)
• Project Period (FY): 2021-07-09 – 2023-03-31
• Keywords: カテナン / ロタキサン / ポリカテナン / 環状 / ラジカル / 動的共有結合 / 超分子

Outline of Final Research Achievements

In this study, we established a selective cyclization reaction using a dynamic covalent bond that generates a stable radical as an intermediate, and by combining it with supramolecular interactions, we tried a method for easily and precisely synthesizing polycatenanes. Although we were not able to selectively synthesize polycatenane as originally planned, we succeeded in synthesizing [3]catenane by a relatively simple method. In the future, we aim to synthesize polycatenanes by designing optimal templates and chemical structures that facilitate the formation of supramolecular complexes. Through this research project, we were able to obtain several important results that will serve as the basis for polycatenan synthesis.

Free Research Field

高分子化学

Academic Significance and Societal Importance of the Research Achievements

ポリカテナンは、高い伸張性や強靭性といった空間連結に由来する特異的な機能・物性を発現することが期待されている。すなわち、「安価」で「軽い」高分子材料の利点を生かしつつ、金属やセラミックスにも劣らぬ機能や強靭性をもつ高分子材料を創出し、材料化学が直面している薄膜化、軽量化の課題解決に対して解決策を打ち出すことができる。本研究で提案する合成手法は、斬新且つユニークな手法であり、高分子・超分子化学の発展に大きく資するものと期待している。