Fabrication of charge-transfer assembled thin films by electrochemical methods and control of magnetic property

2020 Fiscal Year Final Research Report

• Project/Area Number: 19K15518
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 32020:Functional solid state chemistry-related
• Research Institution: Kumamoto University (2020); Tohoku University (2019)
• Principal Investigator: Sekine Yoshihiro 熊本大学, 大学院先導機構, 准教授 (40733465)
• Project Period (FY): 2019-04-01 – 2021-03-31
• Keywords: 金属錯体化学 / 電子ドナー・アクセプター / 磁性 / 薄膜

Outline of Final Research Achievements

In this study, we have investigated the charge-transfer assemblies (D/A-MOFs), in which the electron donor (D) and acceptor (A) are covalently linked, for constructing thin films materials and switching their electronic and magnetic properties. We have successfully constructed charge-transfer aggregate thin films by electrochemical deposition method using a carboxylate-bridged diruthenium complex (D) and a TCNQ derivative (A). Furthermore, we have fabricated a series of various D/A-MOF thin films. We also achieved reversible and fast switching of electronic states in D/A-MOF thin films by electrochemical redox reaction.

Free Research Field

錯体化学

Academic Significance and Societal Importance of the Research Achievements

外場応答性分子としてエレクトロクロミック分子やスピン転移化合物、pH応答発光分子など数多く報告されているが、電気化学的刺激によって磁気機能変換を示す分子性化合物は稀有である。本研究の対象物質が酸化還元活性な磁気格子であるため、電気化学的な電子輸送・イオン輸送に伴って高速な磁気機能変換が期待できる点は意義深い。