Synthesis of Helical Conjugated Polymers in External Force-Responsive Chiral Liquid Crystal Field and Control of Their Optoelectronic Properties

2023 Fiscal Year Final Research Report

• Project/Area Number: 20H02818
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 35030:Organic functional materials-related
• Research Institution: Ritsumeikan University
• Principal Investigator: Akagi Kazuo 立命館大学, 総合科学技術研究機構, 教授 (20150964)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: キラル液晶 / 不斉反応場 / 外部刺激応答 / 共役ポリマー / ヘリシティ制御

Outline of Final Research Achievements

We synthesized chiral compounds that reversibly invert chirality in response to external stimuli such as temperature and light, and subsequently prepared chiral liquid crystals responsive to external stimuli by adding them to nematic liquid crystals as chiral dopants. Using the chiral liquid crystal as an asymmetric reaction field, helical conjugated polymers with electronic and optical functions were synthesized. This study has led to the construction of an asymmetric reaction field in which chirality can be dynamically controlled by external stimuli, as well as the academic development of the asymmetric synthesis of conjugated polymers.

Free Research Field

高分子化学、液晶化学、物質化学

Academic Significance and Societal Importance of the Research Achievements

本研究において、化学的にも光照射に対しても捻れ力を安定的に保持し、不斉重合溶媒として使用に耐え得る、新規の外部刺激応答性キラル液晶を合成した。また、キラル液晶を用いた不斉反応場を構築することで、一次構造から高次構造に至るまで精緻に制御されたヘリカルポリマーを得ることを可能とした。基礎および応用上の観点からキラリティやらせん構造を有する高機能性共役ポリマーの合成法を開発し、その進展を図ったことに意義がある。