Development of multi-electron redox oligomers toward to functional organic materials

2018 Fiscal Year Final Research Report

• Project/Area Number: 15H03798
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Functional solid state chemistry
• Research Institution: Ehime University
• Principal Investigator: Misaki Yohji 愛媛大学, 理工学研究科(工学系), 教授 (90202340)
• Research Collaborator: SHIRAHATA Takashi ; Yoshimura Aya
• Project Period (FY): 2015-04-01 – 2019-03-31
• Keywords: 二次電池 / 電気伝導体 / 有機デバイス / 酸化還元 / 結晶構造解析

Outline of Final Research Achievements

Several types of new multi-electron redox oligomers were successfully synthesized. The redox behavior of the obtained molecules was elucidated by cyclic voltammetry. A rechargeable battery using a dimeric TTPY with cyclohexene inserted as a positive electrode material exhibits relatively high charge-discharge performance. X-ray structure analysis and electrical conductivity measurement of the cation radical salt based on a trimeric TTF with different substituents were successful, and revealed that its electronic state is charge ordered state or a Mott insulator. Furthermore, it was found that a trimer in which one of the TTF units is replaced with TSF exhibits metallic conductivity at around room temperature.

Free Research Field

構造有機化学，物性有機化学，有機固体化学，有機電気化学，有機材料化学

Academic Significance and Societal Importance of the Research Achievements

本研究課題で新たに合成に成功した多電子レドックス型オリゴマー分子は特異な酸化還元挙動を示すと共に，効率的に電荷秩序型の分子性導体を開発できる可能性を秘めた物質群である。そのため，学術的に興味深い化合物群であるとともに，二次電池の正極活物質，光エネルギーを電力に変換する強相関太陽電池の候補物質への展開が期待される物質群である。今後，得られた成果に基づいて，エネルギーの高効率利用に関する応用研究へと発展させることができたならば，持続可能な社会を実現する上で意義深く，波及効果は大きいと期待される。