Synthesis and magnetic properties of magneto-optically active helical polymers

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K05626
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 35020:Polymer materials-related
• Research Institution: University of Tsukuba
• Principal Investigator: HIROMASA GOTO 筑波大学, 数理物質系, 准教授 (40292528)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 磁性 / 高分子合成 / 繊維科学 / キラリティー / らせん高分子 / 電子スピン共鳴 / 超伝導量子干渉計 / X線回折

Outline of Final Research Achievements

Chiral magnetic polymers and composites were prepared. We have also performed precision synthesis of polyphenylisocyanides in liquid crystals, which are main-chain helical polymers. We also synthesized living polymeric chiral magnetic block copolymers with a polythiophene moiety and high stereo-regularity. Phenoxy radicals were introduced as magnetic blocks. A chiral substituent was introduced into the side chain of the other monomer block. Their magnetism was characterized by electron spin resonance (ESR) and superconducting quantum interferometry (SQUID).In summary, we have synthesized polymeric materials with both magnetic and optically active properties and evaluated their physicochemical properties.

Free Research Field

高分子化学

Academic Significance and Societal Importance of the Research Achievements

高分子磁性体とらせん高分子を融合した新しい光学活性らせん磁性体の研究である。磁性と光学活性を併せもつ高分子物質の合成と物理化学的な物性の評価を行った。本研究はポリマーキラル磁性や高分子スピンエレクトロニクスへの新たなアプローチとなる。また高分子の精密合成を基盤とする磁気－光学活性芳香族リビング重合への方向性を示すことができた。液晶と光学活性共役系高分子の合成手法を組み合わせ、電気-光学-磁気活性ヘリカル高分子を実現したことに学術的意義がある。