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Ferroelectricity and its application to LCD of Bent-shaped molecules of small bending angle

Research Project

Project/Area Number 21750138
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Functional materials chemistry
Research InstitutionTokyo Institute of Technology

Principal Investigator

KANG Sungmin  Tokyo Institute of Technology, 大学院・理工学研究科, 助教 (00523664)

Project Period (FY) 2009 – 2010
Project Status Completed (Fiscal Year 2010)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2009: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Keywordsキラリティ / バナナ型分子 / 強誘電性 / バナナ型液晶 / スメクチック相 / ディスプレイ
Research Abstract

We have synthesized novel bent-core liquid crystal materials by using 1,7-dihydroxynaphthalene and aklylthio terminal chain groups. A novel SmAP phase was observed where the polarization is lying parallel to the layer by extention to seven rings mesogen with 1,7-naphthalene core, which clearly showed a possibility to the application to in-plane switching mode. Furthermore, in the system which 1,7-naphthalene is combined with alkylthio terminal group, a novel switchable columnar phase was detected. The formation of novel columnar phase was understood by a high layer curvature due to the small bent angle structure of molecular design, which provides further scientific interests it self in addition to the anticipation to application of LC display.

Report

(3 results)
  • 2010 Annual Research Report   Final Research Report ( PDF )
  • 2009 Annual Research Report
  • Research Products

    (18 results)

All 2010 2009

All Journal Article (16 results) (of which Peer Reviewed: 16 results) Presentation (2 results)

  • [Journal Article] Antiferroelectric switching between optically isotropic and birefringent B2 phases of bent-shaped molecules with high tilt angle of 45°2010

    • Author(s)
      Seng Kue Lee, Sungmin Kang, Masatoshi Tokita, Junji Watanabe
    • Journal Title

      Jpn.J.Appl.Phys. 49

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Formation of a homochiral antiferroelectric ground state in asymmetric bent-shaped molecules2010

    • Author(s)
      Seng Kue Lee, Sungmin Kang, Masatoshi Tokita, Junji Watanabe
    • Journal Title

      Liq.Cryst. 37

      Pages: 593-598

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Unique Reflection Property due to Bumpy Multilayer Structure in Elytra of Rhomborrhina Unicolor2010

    • Author(s)
      Susumu Edo, Kento Okoshi, Sungmin Kang, Masatoshi Tokita, Junji Watanabe
    • Journal Title

      Jpn.J.Appl.Phys. 49

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Syntehsis of Liquid Crystal Molecules Based on bis(byphenyl)diacetylene and Their Liquid Crystallinity2010

    • Author(s)
      Makoto Uchimura, Sungmin Kang, Ryohei Ishige, Gen-ichi Konishi, Junji Watanabe
    • Journal Title

      Chem.Lett. 39

      Pages: 513-515

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Electric-field-induced transition between ferro- and antiferroelectric ground states observed in the B7 phases of a bent-shaped molecule with alkylthio tails2010

    • Author(s)
      Seng Kue Lee, Xiaodong Li, Sungmin Kang, Masatoshi Tokita, Junji Watanabe
    • Journal Title

      J.Mater.Chem. 20

      Pages: 3615-3618

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Unusual formation of switchable hexagonal columnar phase by bent-shaped molecules with lowbent-angle naphthalene central core and alkylthio tail2010

    • Author(s)
      Xiaodong Li, Sungmin Kang, Seng Kue Lee, Masatoshi Tokita, Junji Watanabe
    • Journal Title

      Jpn.J.Appl.Phys. 49

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Unique Reflection Property due to Bumpy Multilayer Structure in Elytra of Rhomborrhina Unicolor2010

    • Author(s)
      S.Edo, K..Okoshi, S.Kang, M.Tokita, J.Watanabe
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 49

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Syntehsis of Liquid Crystal Molecules Based on bis(byphenyl)diacetyleneand Their Liquid Crystallinity2010

    • Author(s)
      M.Uchimura, S.Kang, R.Ishige, G.Konishi, J.Watanabe
    • Journal Title

      Chemistry Letters

      Volume: 39 Pages: 513-515

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Unusual Formation of Switchable Hexagonal Columnar Phase by Bent-Shaped Molecules with Low Bent-Angle Naphthalene Central Core and Alkylthio Tail2010

    • Author(s)
      X.Li, S.Kang, S.K.Lee, M.Tokita, J.Watanabe
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 49

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Formation of banana phases in bent-shaped molecules with unusual bent angles as low as 60°2009

    • Author(s)
      Seng Kue Lee, Xiaodong Li, Sungmin Kang, Masatoshi Tokita, Junji Watanabe
    • Journal Title

      J.Mater.Chem. 19

      Pages: 4517-4522

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Mesoporphic properties in asymmetric bent-shaped molecules with different linkage moieties as side wings2009

    • Author(s)
      Sungmin Kang, Seng Kue Lee, Xiaodong Li, Masatoshi Tokita, Junji Watanabe
    • Journal Title

      Chem.Lett. 38

      Pages: 852-853

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Effect of alkylthio tail on phase behaviors of bent-shaped molecules beased on naphthalene core2009

    • Author(s)
      Xiaodong Li, Seng Kue Lee, Sungmin Kang, Masatoshi Tokita, Susumu Kawauchi, Junji Watanabe
    • Journal Title

      Chem.Lett. 38

      Pages: 424-425

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Atomic force microscope observation of nano-ordered undulation structure formed by bent-shaped molecules2009

    • Author(s)
      Susumu Edo, Xiaodong Li, Masatoshi Tokita, Sungmin Kang, Junji Watanabe
    • Journal Title

      Jpn.J.Appl.Phys. 48

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Structural characteristics of the B6 phase for a bent-core molecular system observed through the B1-B6 transition2009

    • Author(s)
      S.Kang, S.K.Lee, M.Tokita, J.Watanabe
    • Journal Title

      Physical Review E 80

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of Alkylthio tail on Phase behaviors of Bent-shaped Molecules based on Naphthalene core2009

    • Author(s)
      X.Li, S.K.Lee, S.Kang, M.Tokita, J.Watanabe
    • Journal Title

      Chemistry Letters 38

      Pages: 424-425

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Mesomorphic Properties in Asymmetric Bent-shaped Molecules wit Different Linkage Moieties as Side Wings2009

    • Author(s)
      S.Kang, S.K.Lee, X.Li, M.Tokita, J.Watanabe
    • Journal Title

      Chemistry Letters 38

      Pages: 852-853

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Presentation]2010

    • Author(s)
      Sungmin Kang, Xiaodong Li, Masatoshi Tokita, Junji Watanabe
    • Organizer
      Switchable Columnar Phase in Bent-Core Molecules with Low Bent angle Central core Pacifichem
    • Place of Presentation
      ホノルル・ハワイ
    • Year and Date
      2010-12-18
    • Related Report
      2010 Final Research Report
  • [Presentation] Switchable Columnar Phase in Bent-Core Molecules with Low Bent angle Central core2010

    • Author(s)
      姜聲敏
    • Organizer
      Pacifichem 2010
    • Place of Presentation
      ホノルル・ハワイ
    • Year and Date
      2010-12-18
    • Related Report
      2010 Annual Research Report

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Published: 2009-04-01   Modified: 2016-04-21  

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