Synthesis of perfluoronaphthalene cation salts and their new applications

2021 Fiscal Year Final Research Report

• Project/Area Number: 20K21235
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 36:Inorganic materials chemistry, energy-related chemistry, and related fields
• Research Institution: Kyoto University
• Principal Investigator: Matsumoto Kazuhiko 京都大学, エネルギー科学研究科, 准教授 (30574016)
• Project Period (FY): 2020-07-30 – 2022-03-31
• Keywords: ラジカルカチオン / パーフルオロ芳香族化合物 / 強酸化剤

Outline of Final Research Achievements

Although perfluoroaromatic cations, such as the perfluoronaphthalene cation, in which all hydrogen atoms are substituted by fluorine atoms, are known to provide relatively stable salts, their research has not been widely carried out. The purpose of this study is to establish a method to synthesize perfluoronaphthalene cation salts and to understand their electrochemical behavior.
In terms of synthetic progress, the AsF6 salt was synthesized by using a　oxidatively stable solvent. Anion-exchange methods for radical cation salts　generated the corresponding radical salts, but they are all decomposed prior to isolation and a more stable anion was required for long-term stability. For redox behavior, new electrochemical parameters were obtained by cyclic voltammetry, and an EC reaction was suggested in this system.

Free Research Field

フッ素化学

Academic Significance and Societal Importance of the Research Achievements

本研究では取り扱いが難しい試薬を用いて、パーフルオロラジカルカチオン塩を合成するが、ここで得られた成果は、合成化学の分野で同様なラジカルカチオン塩の合成に寄与すると考えられる。また、分光データや回折データは構造化学に広い分野に波及するものである。エネルギー化学といった観点からは、あらたな電気化学デバイスの構築など応用分野への展開が考えられる。前例のあまりない研究分野ではあるが、こ子で得られた成果は今後世界的に大きな潮流を引き起こす可能性があるものである。