Material applications with heteroatom containing pi-conjugated molecules

2022 Fiscal Year Final Research Report

• Project/Area Number: 19H02702
• 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: Kyoto University
• Principal Investigator: Hiroto Satoru 京都大学, 人間・環境学研究科, 准教授 (30547427)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: ヘリセン / 極性結晶 / 近赤外発光 / 積層制御 / ラジカルカチオン

Outline of Final Research Achievements

The aim of this study was to control the structure and electronic state of curved π-conjugated molecules containing nitrogen elements by installing or modifying substituents, and to create new functions using the unique properties of curved π-conjugated molecules. As a result, control of the stacking structure of bowl-shaped molecules and control of structural and photochemical properties by substituents on twisted molecules were achieved. In particular, they developed a selective substituent conversion reaction of azahelicenes and succeeded in creating unprecedented functions such as near-infrared emission and spontaneous polarization based on this reaction.

Free Research Field

構造有機化学

Academic Significance and Societal Importance of the Research Achievements

本研究ではこれまで使い道が不透明であった曲面π共役分子の材料展開における重要な知見を与える。特に、三次元構造と分子間相互作用を巧みに活用した固体中での積層構造の制御は、有機半導体だけでなく強誘電体や焦電体などこれまで有機材料にあまり活躍の場がなかった材料分野への応用可能性を広げるものである。さらに、発光性のらせん分子の創出や分子設計における知見は生体内におけるらせん化合物、DNAやRNAとの親和性を期待するものであり、遺伝子を用いた薬剤や生体中における物質の動きの可視化など生体応用への応用展開を伺う重要な知見となる。