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Chiroptical resolution and thermal switching of chirality in conjugated polymer luminescence using selective reflection and transmission of chiral nematic liquid crystal

Research Project

Project/Area Number 17K19156
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Research Field Polymer, Organic materials, and related fields
Research InstitutionRitsumeikan 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) 2017-06-30 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2018: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2017: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Keywordsキラル液晶 / 選択反射・透過 / 共役ポリマー / 光キラル分割 / 円偏光発光 / キラリティー / 温度依存性 / キラルスイッチング / 選択反射 / キラル分割
Outline of Final Research Achievements

An optically resolvable and thermally chirality-switchable device for circularly polarized luminescence (CPL) was constructed using a fluorescent conjugated polymer film and a chiral nematic liquid crystal (N*-LC) cell. The double-layered N*-LC cell with opposite handedness at each layer was fabricated by adding each of two types of N*-LCs into each of the cells, and the N*-LCs consist of nematic LCs and chiral dopants with opposite chirality and different mole concentrations. The selective reflection band due to the N*-LC is thermally shifted so that the band wavelength is close to the luminescence band of the racemic conjugated polymer, yielding CPL with opposite handedness and high dissymmetry factor values of 1.1~1.6 at low and high temperatures. The double-layered N*-LC cell bearing the temperature-controlled selective reflection is useful for generating CPLs from racemic fluorescent materials and for allowing thermally chirality-switching in CPLs.

Academic Significance and Societal Importance of the Research Achievements

キラル液晶の選択反射・透過能を用いて、アキラルまたはラセミ体の共役ポリマーの発光を円偏光発光に変換し、さらに円偏光発光の非対称性因子(gファクター)を理想値の2近くまで増幅させることで、キラル物質の励起状態での構造と挙動に関する学理が進展するとともに、三次元表示ディスプレーや暗号化された光通信などへの応用展開が期待されている。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • Research Products

    (42 results)

All 2019 2018 2017 Other

All Int'l Joint Research (3 results) Journal Article (14 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 10 results,  Open Access: 14 results,  Acknowledgement Compliant: 2 results) Presentation (17 results) (of which Int'l Joint Research: 7 results,  Invited: 12 results) Book (4 results) Remarks (4 results)

  • [Int'l Joint Research] ソウル大学・物理天文学科(韓国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] ブリストル大学・化学科(英国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Seoul National University(韓国)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Chiral Liquid-Crystalline Ionic Liquid Systems Useful for Electrochemical Polymerization that Affords Helical Conjugated Polymers2019

    • Author(s)
      S. Yamakawa, K. Wada, M. Hidaka, T. Hanasaki, K. Akagi
    • Journal Title

      Adv. Funct. Mater.

      Volume: 29 Issue: 12 Pages: 1806592-1806608

    • DOI

      10.1002/adfm.201806592

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Interdisciplinary Chemistry Based on Integration of Liquid Crystals and Conjugated Polymers - Development and Progress2019

    • Author(s)
      K. Akagi
    • Journal Title

      Bull. Chem. Soc. Jap.

      Volume: -

    • NAID

      130007706745

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Low-density graphitic films prepared from iodine-doped enzymatically synthesized amylose films as carbonization precursors2018

    • Author(s)
      B. Yan, S. Matsushita, S. Suzuki, S. Kitamura, T. Kaiho, K. Akagi
    • Journal Title

      Carbohydrate Polymers

      Volume: 196 Pages: 332-338

    • DOI

      10.1016/j.carbpol.2018.05.050

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Conjugated polymer-based carbonaceous films as binder-free carbon electrodes in supercapacitors2018

    • Author(s)
      S. Matsushita, B. Yan, T. Matsui, J.-D. Kim, K. Akagi
    • Journal Title

      RSC Advances

      Volume: 8 Issue: 35 Pages: 19512-19523

    • DOI

      10.1039/c8ra00267c

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Probing Variable Range Hopping Lengths by Magneto Conductance in Carbonized Polymer Nanofibers2018

    • Author(s)
      K. H. Kim, S. L.-Avila, H. He, H. Kang, S. J. Hong, M. Park, J. Eklof, K. M. Poulsen, S. Matsushita, K. Akagi, S. Kubatkin, Y. W. Park
    • Journal Title

      Sci. Rep

      Volume: 8 Issue: 1

    • DOI

      10.1038/s41598-018-23254-0

    • NAID

      120006529713

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Circularly Polarized Luminescence of Helically Assembled Pyrene π-Stacks on RNA and DNA Duplexes2018

    • Author(s)
      M. Nakamura, F. Ota, T. Takada, K. Akagi, K. Yamana
    • Journal Title

      Chirality

      Volume: -

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] らせん状共役系高分子の創成と開拓2018

    • Author(s)
      赤木和夫
    • Journal Title

      Science Academy of Tsukuba

      Volume: 33 Pages: 13-14

    • Related Report
      2017 Research-status Report
    • Open Access
  • [Journal Article] Chiroptical Resolution and Thermal Switching of Chirality in Conjugated Polymer Luminescence via Selective Reflection using a Double-Layered Cell of Chiral Nematic Liquid Crystal2017

    • Author(s)
      J. Yan, F. Ota, B. A. San Jose, K. Akagi
    • Journal Title

      Adv. Funct. Mater.

      Volume: 27 Issue: 2 Pages: 1604529-1604539

    • DOI

      10.1002/adfm.201604529

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Aligned Carbon and Graphite Fibers Prepared from Poly(3,4-ethylenedioxythiophene) Single Crystals Synthesized by Solid-State Polymerization and Their Supercapacitor Performance2017

    • Author(s)
      B. Yan, S. Matsushita, K. Akagi
    • Journal Title

      J. Mater. Chem. C

      Volume: 5 Issue: 15 Pages: 3823-3829

    • DOI

      10.1039/c7tc00709d

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Electrochromically and Photochromically Controllable Multifunctional OligoEDOT Derivatives2017

    • Author(s)
      S. Matsushita, Y. S. Jeong, Y. Okada, H. Hayasaka, K. Akagi
    • Journal Title

      Adv. Funct. Mater.

      Volume: 32 Issue: 32

    • DOI

      10.1002/adfm.201700929

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Preparation of 2D Carbon Materials by Chemical Carbonization of Cellulosic Materials to Avoid Thermal Decomposition2017

    • Author(s)
      M. Kyotani, K. Hiratani, T. Okada, S. Matsushita, K. Akagi
    • Journal Title

      Global Challenges.

      Volume: 1 Issue: 7

    • DOI

      10.1002/gch2.201700061

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 麻中の蓬2017

    • Author(s)
      赤木和夫
    • Journal Title

      高分子

      Volume: 66 Pages: 210-210

    • Related Report
      2017 Research-status Report
    • Open Access
  • [Journal Article] 多岐亡羊の道2017

    • Author(s)
      赤木和夫
    • Journal Title

      液晶

      Volume: 21 Pages: 91-91

    • Related Report
      2017 Research-status Report
    • Open Access
  • [Journal Article] 覧古考新の賜物 キラル液晶からヘリカルグラファイトまで2017

    • Author(s)
      赤木和夫
    • Journal Title

      化学と工業

      Volume: 70 Pages: 719-721

    • Related Report
      2017 Research-status Report
    • Open Access
  • [Presentation] 液晶と共役ポリマーとの融合2019

    • Author(s)
      赤木和夫
    • Organizer
      有機機能材料化学特論セミナー
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Hierarchical Structures and Chiroptical Properties of Helical Conjugated Polymers2019

    • Author(s)
      K. Akagi
    • Organizer
      International Symposium on Circularly Polarized Luminescence and Related Phenomena
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 共役ポリマーを前駆体とするヘリカルグラファイトの創製2019

    • Author(s)
      赤木和夫
    • Organizer
      黒鉛化合物研究会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 光応答性キラル液晶場での共役ポリマーの合成とそのヘリカル構造の光制御2019

    • Author(s)
      吉田悟,日高将智,森川陽太,金子喜三好,花崎知則,赤木和夫
    • Organizer
      第68回高分子学会年次大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Helical Carbon and Graphite Films Prepared from Helical Conjugated Polymers2018

    • Author(s)
      K. Akagi
    • Organizer
      The KAST Int. Workshop on Carbon Nanoelectronics
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Conjugated Polymers-Based Multifunctional Materials with Stimuli-Responsive Helical Structures and Chiroptical Properties2018

    • Author(s)
      K. Akagi
    • Organizer
      International Conference on Science and Technology of Synthetic Metals (ICSM 2018)
    • Related Report
      2018 Annual Research Report 2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Helical Structures and Chiroptical Properties of Conjugated Polymers2018

    • Author(s)
      K. Akagi
    • Organizer
      International Symposium on Advanced Display Materials and Devices (ADMD 2018)
    • Related Report
      2018 Annual Research Report 2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Helical Carbon and Graphite Films Prepared from Helical Conjugated Polymers2018

    • Author(s)
      K. Akagi
    • Organizer
      International Workshop on Carbon Nanoelectronics
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Helical Structures and Chiroptical Properties of Multifunctional Conjugated Polymers2017

    • Author(s)
      K. Akagi
    • Organizer
      2nd. International Conference and Exhibition on Polymer Chemistry
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Conjugated Polymers with External Stimulus-Responsive Helical Structures and Chiroptical Properties2017

    • Author(s)
      K. Akagi
    • Organizer
      International Workshop on Chirality in Soft Matter
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 液晶と共役ポリマーとの融合化学の開拓と展開2017

    • Author(s)
      赤木和夫
    • Organizer
      日本化学会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] ソフト材料としての共役ポリマーの合成、構造、および電子・光機能2017

    • Author(s)
      赤木和夫
    • Organizer
      第2回ソフトロボット・メカニカル材料シンポジウム
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 電子・光機能性ポリマーおよびナノカーボンの合成と物性2017

    • Author(s)
      赤木和夫
    • Organizer
      生命環境科学研究 特別セミナー
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] キラル液晶場での光カチオン重合によるヘリカルネットワークポリマーの合成とその円偏光発光特性2017

    • Author(s)
      楠 賢、稲垣拓也、赤木和夫
    • Organizer
      第66回高分子学会年次大会
    • Related Report
      2017 Research-status Report
  • [Presentation] キラル置換型ポリメタフェニレンエチニレン誘導体の凝集状態でのキラル反転2017

    • Author(s)
      日高将智、閻柏如、松下哲士、赤木和夫
    • Organizer
      第66回高分子学会年次大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 多重分子間相互作用を利用したキラルおよびアキラル芳香族共役系ポリマー間でのキラリティ転写2017

    • Author(s)
      原田恭佑、野津賢祐、赤木和夫
    • Organizer
      第66回高分子学会年次大会
    • Related Report
      2017 Research-status Report
  • [Presentation] キラルネマチック相を示す液晶性イオン液体の合成と不斉電解重合への応用2017

    • Author(s)
      和田浩平、山川勝平、赤木和夫
    • Organizer
      第66回高分子学会年次大会
    • Related Report
      2017 Research-status Report
  • [Book] 4th Edition of the Handbook of Conducting Polymers, Ed. B.C. Thompson, J. R. Reynolds, T. A. Skotheim2019

    • Author(s)
      K. Akagi
    • Publisher
      CRC Press, Taylor & Francis Group, LLC
    • Related Report
      2018 Annual Research Report
  • [Book] 新訂版・21世紀 薄膜作製応用ハンドブック、第4編第7章第2節π共役高分子薄膜、第1項 階層制御ポリマー2019

    • Author(s)
      赤木和夫
    • Publisher
      エヌ・ティー・エス
    • Related Report
      2018 Annual Research Report
  • [Book] Functional Organic and Hybrid Nanostructured Materials: Fabrication, Properties, and Applications, Ed., Q. Li2018

    • Author(s)
      S. Matsushita, B. A. San Jose, K. Akagi
    • Total Pages
      34
    • Publisher
      Wiley-VCH
    • ISBN
      9783527342549
    • Related Report
      2018 Annual Research Report
  • [Book] Functional Organic and Hybrid Nanostructured Materials: Fabrication, Properties, and Applications2018

    • Author(s)
      S. Matsushita, B. A. San Jose, K. Akagi (分担執筆)
    • Total Pages
      656
    • Publisher
      John Wiley and Sons
    • ISBN
      9783527342549
    • Related Report
      2017 Research-status Report
  • [Remarks] 立命館大学 総合科学技術研究機構 赤木研究室

    • URL

      http://www.ritsumei.ac.jp/~akagi/akagi_hp_2014_ritsumei/

    • Related Report
      2018 Annual Research Report
  • [Remarks] 立命館大学 総合科学技術研究機構 赤木研究室

    • URL

      http://www.ritsumei.ac.jp/~akagi/akagi_hp_2014_ritsumei/index.html

    • Related Report
      2017 Research-status Report
  • [Remarks] Akagi Laboratory, Ritsumeikan University

    • URL

      http://www.ritsumei.ac.jp/~akagi/akagi_hp_2014_ritsumei/akagi_hp-english/index.html

    • Related Report
      2017 Research-status Report
  • [Remarks] 総合科学技術研究機構

    • URL

      http://research-db.ritsumei.ac.jp/Profiles/133/0013243/profile.html

    • Related Report
      2017 Research-status Report

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Published: 2017-07-21   Modified: 2022-02-22  

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