Studies on pi-Topology Dependence of the Ground and Excited States for Radical-introduced Organic pi-Electron System

2021 Fiscal Year Final Research Report

• Project/Area Number: 20K15263
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 33010:Structural organic chemistry and physical organic chemistry-related
• Research Institution: Osaka City University
• Principal Investigator: Kohei Yoshida 大阪市立大学, 大学院理学研究科, 特任助教 (20845789)
• Project Period (FY): 2020-04-01 – 2022-03-31
• Keywords: πトポロジー / 非交互炭化水素 / フェノチアジン / ラジカルカチオン

Outline of Final Research Achievements

The purpose of this study was to elucidate the interaction between radical cations and non alternating hydrocarbon π-electron systems. Phenothiazine, which can be generated relatively stable radical cation species by oxidation, was introduced into azulene, but unstable radical cations were formed. By increasing the steric hindrance of azulene sufficiently, relatively stable radical cation species were successfully synthesized, and interactions with nonalternating hydrocarbons due to the radical cation were observed.

Free Research Field

物性有機化学

Academic Significance and Societal Importance of the Research Achievements

本研究での非交互炭化水素π電子系とラジカルカチオン種を組み合わせた分子系に関する知見は、電荷を有するラジカルとの相互作用の発見であり、今後の研究でさらなる機能の創出が期待される。また、比較的高い安定性を有するラジカルカチオン種の分子設計指針も見出すことができたことから、今回の分子系を拡張してさらに研究を推し進めることも可能である。