• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Molecular Mechanism of Gyroid Formation by Small Mesogenic Molecules

Research Project

Project/Area Number 21H01046
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 13040:Biophysics, chemical physics and soft matter physics-related
Research InstitutionUniversity of Tsukuba

Principal Investigator

Kazuya SAITO  筑波大学, 数理物質系, 教授 (30195979)

Co-Investigator(Kenkyū-buntansha) 山村 泰久  筑波大学, 数理物質系, 准教授 (80303337)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2023: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2022: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2021: ¥9,230,000 (Direct Cost: ¥7,100,000、Indirect Cost: ¥2,130,000)
Keywordsジャイロイド / 液晶 / エントロピー / 凝集構造 / スピンモデル / ジャングルジム / ねじれ / 自己集合 / キラリティー / ネットワーク / 熱力学 / 古典スピンモデル / 分子論
Outline of Research at the Start

分子間相互作用の直接的到達範囲を遙かに超えた長い周期性がなぜ形成されるかという問いに迫ることを究極的な目標とする.実施者らのこれまでの研究成果を背景に,低分子物質が作るジャイロイド液晶相と,それに隣接する層状液晶相において,分子コアだけで無くアルキル鎖部分を含めた液晶分子の充填様式の解析を進め.高分子・液晶などがしばしば示す高次構造であるジャイロイド構造の形成機構の分子論の構築を行う.

Outline of Final Research Achievements

Structure analyses of the chiral cubic phase, neighboring to the gyoid phase on the phase diagram against the alkyl-chain length of rodlike mesogens, were achieved utilizing a new crystallographic algorithm. The result suggested the importance of smooth variations of molecular orientations, which is identified as a new mechanism for the structure formation of complicated superstructures consisting of rodlike molecules.
In layered liquid crystals, the details of the layer structure, such as sharpness, dominate the physical properties. For example, the details successfully explain the thermodynamic order of the phase transition between the two liquid crystalline phases, smectic A and nematic.
A headless classical Heisenberg model preferring twist, inspired by the twist in the gyroid phase, exhibits intriguing properties, such as the macroscopic degeneracy without frustration, a phase transition without long-range order in dimension two, and three-step ordering in dimension four.

Academic Significance and Societal Importance of the Research Achievements

本研究の結果は,液晶分子を棒と考えずに主要な内部構造を考慮することにより,凝集構造や物性の理解が飛躍することを示している.また,平衡状態における複雑な超構造(メゾスコピックな構造)の生成機構としては,これまでもっぱら相分離が考えられてきたが,今回の研究により相分離を伴わない機構が見出された.超構造形成や自己組織化の研究に,新しい視点をもたらした.
また,派生的に得られたスピンモデルの統計的挙動は,長距離秩序を伴わない相転移が可能であることを示すことが興味深いだけで無く,有限系の「相転移」様挙動の可能性を示しており,工学的な応用の可能性も考え得る.

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (45 results)

All 2023 2022 2021 Other

All Int'l Joint Research (3 results) Journal Article (13 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 12 results,  Open Access: 2 results) Presentation (29 results) (of which Int'l Joint Research: 8 results,  Invited: 5 results)

  • [Int'l Joint Research] ブロツワフ大学/ジェシェフ工科大学(ポーランド)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] ブロツワフ大学/ジェシュフ工科大学(ポーランド)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] ブロツワフ大学(ポーランド)

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Aggregation structure of chiral cubic liquid crystals revealed by X-ray diffraction utilizing a new algorithm2023

    • Author(s)
      Toshihiko Oka, Yasuhisa Yamamura, Shoich Kutsumizu, and Kazuya Saito
    • Journal Title

      Soft Matter

      Volume: 19 Issue: 6 Pages: 1194-1201

    • DOI

      10.1039/d2sm01687g

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Reticular-Chemical Approach to Soft-Matter Self-Assembly: Why Are <i>srs</i> and <i>noh</i> Nets Realized in Thermotropics?2023

    • Author(s)
      Saito Kazuya, Yamamura Yasuhisa
    • Journal Title

      Bulletin of the Chemical Society of Japan

      Volume: 96 Issue: 7 Pages: 607-613

    • DOI

      10.1246/bcsj.20230075

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Room-temperature <i>Ia</i>3<i>d</i> phase obtained for the binary mixture containing different sizes of siloxanyl terminals2023

    • Author(s)
      Kawase Yuki、Kutsumzu Shoichi、Udagawa Taro、Miwa Yohei、Yamamura Yasuhisa、Saito Kazuya
    • Journal Title

      Physical Chemistry Chemical Physics

      Volume: 25 Issue: 29 Pages: 19891-19898

    • DOI

      10.1039/d3cp02200e

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Spontaneous formation of cubic phases: a molecular dynamics study for soft repulsive spherocylinders2023

    • Author(s)
      Keiko M. Aoki, Yasuhisa Yamamura, Shoichi Kutsumizu, and Kazuya Saito
    • Journal Title

      Liquid Crystals

      Volume: 50 Issue: 7-10 Pages: 1383-1391

    • DOI

      10.1080/02678292.2022.2157502

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Molecular aggregation in liquid-crystalline layers crucially affects their physics: smectic A (SmA)?nematic (N) phase transition2023

    • Author(s)
      Yamamura Yasuhisa, Ito Mizuki, Sugai Kazutaka, Noda Hiroshi, Galewski Zbigniew, Saito Kazuya
    • Journal Title

      Soft Matter

      Volume: 19 Issue: 37 Pages: 7245-7254

    • DOI

      10.1039/d3sm00958k

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Three-Step Ordering of Classical Headless Spins Preferring Twists on Icositetrachoric Honeycomb, a Four-Dimensional Analog of the Triangular Lattice2023

    • Author(s)
      Saito Kazuya, Yamamura Yasuhisa
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 92 Issue: 5

    • DOI

      10.7566/jpsj.92.054003

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Personal Draft of Studying Macroscopic Physical Properties as a Molecular Science: Molecular Dynamics and Internal Motional/Conformational Degrees of Freedom2023

    • Author(s)
      齋藤一弥
    • Journal Title

      Molecular Science

      Volume: 17 Issue: 1 Pages: A0128

    • DOI

      10.3175/molsci.17.A0128

    • ISSN
      1881-8404
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 棒状低分子のつくる立方対称超構造の 形成機構2023

    • Author(s)
      齋藤一弥
    • Journal Title

      C & I Communications

      Volume: 48 Pages: 32-35

    • Related Report
      2023 Annual Research Report
    • Open Access
  • [Journal Article] Headless Heisenberg Spin Models Preferring Twist on Triangular Lattice: Phase Transition under External Field2022

    • Author(s)
      Saito Kazuya, Yamamura Yasuhisa
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 91 Issue: 7

    • DOI

      10.7566/jpsj.91.074007

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Small Spin Clusters Mimicking a Temperature-Induced Phase Transition: Spins on Vertices of Regular Octahedron and Icositetrachoron2022

    • Author(s)
      Saito Kazuya, Yamamura Yasuhisa
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 91 Issue: 10

    • DOI

      10.7566/jpsj.91.104603

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Stabilization of Bicontinuous Cubic Phase and Its Two‐Sided Nature Produced by Use of Siloxane Tails and Introduction of Molecular Nonsymmetry2021

    • Author(s)
      Kutsumizu Shoichi、Kawafuchi Akane、Yamamura Yasuhisa、Udagawa Taro、Otaki Takashi、Masuda Masaki、Miwa Yohei、Saito Kazuya
    • Journal Title

      Chemistry - A European Journal

      Volume: 27 Issue: 40 Pages: 10293-10302

    • DOI

      10.1002/chem.202101233

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Two-Dimensional Spin Model Possibly Undergoing a Phase Transition: Heisenberg Model of Headless Spins Preferring Twist on Triangular Lattice2021

    • Author(s)
      Saito Kazuya、Hishida Mafumi、Yamamura Yasuhisa
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 90 Issue: 12 Pages: 124003-124003

    • DOI

      10.7566/jpsj.90.124003

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Interplay between Melt and Cold Crystallization in a Smectic Liquid 2 Crystal, 4-Pentylphenyl 4-(trans-4-Pentylcyclohexyl)benzoate2021

    • Author(s)
      T. Rozwadowski, Y. Yamamura, K. Saito
    • Journal Title

      Crystal Growth & Design

      Volume: 21 Issue: 5 Pages: 2777-2785

    • DOI

      10.1021/acs.cgd.0c01682

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Reticular-Chemical Approach to Soft-Matter Self-Assembly: Why Do srs and noh Nets Realize in Thermotropics?2023

    • Author(s)
      Kazuya Saito, Yasuhisa Yamamura
    • Organizer
      Topological Soft Matter
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Alkyl Chains in Liquid Crystals2023

    • Author(s)
      Kazuya SAITO
    • Organizer
      Polish Liquid Crystal Conference
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] アキラル棒状分子が自発的に形成するキラルキュービック相の凝集構造2023

    • Author(s)
      岡 俊彦, 山村泰久, 齋藤一弥, 沓水祥一, 大野稜貴, 三輪洋平, 橋本 慧
    • Organizer
      2023年日本液晶学会討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 捩れ配列のネットワークとしてのキュービック液晶2023

    • Author(s)
      齋藤一弥, 山村泰久
    • Organizer
      2023年日本液晶学会討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] SmA相における2種類の分子充填様式と,SmA-N相転移の性質との相関2023

    • Author(s)
      山村泰久, 齋藤一弥
    • Organizer
      2023年日本液晶学会討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] メチル基付与液晶分子が形成する複数の熱サイクルによるキュービック相の内部構造の調査2023

    • Author(s)
      武山京平, 武部颯太, 橋本 慧, 三輪洋平, 沓水祥一, 山村泰久, 齋藤一弥
    • Organizer
      2023年日本液晶学会討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] メクチック A - ネマチック液晶間相転移の熱力学的性質と分子充填様式2023

    • Author(s)
      山村 泰久,齋藤 一弥
    • Organizer
      第59回熱測定討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Schiff base liquid crystal compounds exhibiting HexB phase, 2MBAC and 4MBAC2023

    • Author(s)
      Izumi Akihiro, Yasuhisa Yamamura, Kazuya Saito
    • Organizer
      YOUNG MULTIS 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Aggregation Structure of Chiral Cubic Liquid Crystals Revealed by X-ray Diffraction Utilizing a New Algorithm2023

    • Author(s)
      Toshihiko Oka, Yasuhisa Yamamura, Shoichi Kutsumizu, Kazuya Saito
    • Organizer
      7th International Soft Matter Conference
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 捩れ配列のネットワーク結晶としてのキュービック液晶相2023

    • Author(s)
      齋藤一弥,山村泰久
    • Organizer
      第31回有機結晶シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] Phase Transitions and Molecular Packing Modes in Smectic Liquid Crystal Phases2023

    • Author(s)
      Yasuhisa Yamamura
    • Organizer
      26th IUPAC International Conference on Chemical Thermodynamics (ICCT2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 新しいアルゴリズムを用いたX線回折によるキラルキュービック液晶の凝集構造の解明2023

    • Author(s)
      岡俊彦, 山村泰久, 沓水祥一, 齋藤一弥
    • Organizer
      ソフトマター研究会 第11回研究会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Small Spin Clusters Mimicking a Temperature-Induced Phase Transition2022

    • Author(s)
      Kazuya SAITO
    • Organizer
      Multiscale Phenomena in Condensed Matter (MULTIS2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 正多面体型スピンクラスターの示す温度誘起相転移様挙動2022

    • Author(s)
      齋藤一弥
    • Organizer
      日本応用数理学会2022年度年会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 2種類のSmB相を示すシッフ塩基液晶化合物2MBACと4MBACの相転移2022

    • Author(s)
      秋廣いづみ, 山村泰久, 菱田真史, 齋藤一弥
    • Organizer
      2022年日本液晶学会討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] SmA相において異なる分子充填様式を示す液晶物質PHexOABと8OCBの二成分系の相挙動2022

    • Author(s)
      須貝和剛, 伊藤瑞樹, 野田宙志, 山村泰久, 菱田真史, 齋藤一弥
    • Organizer
      2022年日本液晶学会討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 非対称型のπ電子共役系を有するキュービック液晶性化合物の側方置換基が液晶相形成とその積層構造に与える効果2022

    • Author(s)
      武部颯太, 磯部なちあ, 三輪洋平, 沓水祥一, 山村泰久, 齋藤一弥
    • Organizer
      2022年日本液晶学会討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] キュービック相を発現する4’-alkoxy-3’-cyanobiphenyl-4-carboxylic acid (ACBC)とアゾベンゼン誘導体との二成分系における相挙動および光誘起相転移2022

    • Author(s)
      井戸祐貴, 小松貞広, 三輪洋平, 沓水祥一, 山村泰久, 齋藤一弥
    • Organizer
      2022年日本液晶学会討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 分子コア側方へのフッ素原子の導入がキュービック液晶相形成に与える効果2022

    • Author(s)
      大野稜貴, 武部颯太, 三輪洋平, 沓水祥一, 山村泰久, 齋藤一弥
    • Organizer
      2022年日本液晶学会討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Phase Transition in Finite System?2022

    • Author(s)
      Kazuya SAITO
    • Organizer
      Virtual International Assembly on Calorimetry and Thermal Analysis (VIACTA 2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] シッフ塩基液晶化合物2MBACと4MBACの熱力学的研究2022

    • Author(s)
      秋廣いづみ,山村泰久,菱田真史,齋藤一弥
    • Organizer
      第58回熱測定討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Spontaneous Formation of Cubic Phases2022

    • Author(s)
      K.M. Aoki, Y, Yamamura, S. Kutsumizu, K. Saito
    • Organizer
      28th International Liquid Crystal Conference (ILCC2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 三角格子上の捻れを好む無向古典スピンの集団:外場中の相転移2022

    • Author(s)
      齋藤一弥,山村泰久
    • Organizer
      日本物理学会第77回年次大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] シロキサン鎖末端付与と分子コアの非対称化がもたらすジカルボニルヒドラジン分子の双連続キュービック相形成の二面性2021

    • Author(s)
      沓水祥一,川淵 茜,山村泰久,宇田川太郎,大滝隆史,益田昌樹,三輪洋平,齋藤一弥
    • Organizer
      2021年日本液晶学会討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 非対称型の分子コア部への側方置換基導入が双連続キュービック相形成に与える効果2021

    • Author(s)
      武部颯太,磯部なちあ,三輪洋平,沓水祥一,山村泰久,齋藤一弥
    • Organizer
      2021年日本液晶学会討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] PBOABと8CBのSmA液晶相における分子充填様式とSmA-N相転移2021

    • Author(s)
      伊藤瑞樹,須貝和剛,山村泰久,菱田真史,齋藤一弥
    • Organizer
      第57回熱測定討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] スメクチックA相において異なる分子充填様式を示す液晶物質PHexOABと8OCBの二成分系2021

    • Author(s)
      須貝和剛,伊藤瑞樹,野田宙志,山村泰久,菱田真史,齋藤一弥
    • Organizer
      第57回熱測定討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 非対称型の分子コアへのメチル基導入による双連続キュービック相の低温化の実現2021

    • Author(s)
      武部颯太,磯部なちあ,山村泰久,齋藤一弥,三輪洋平,沓水祥一
    • Organizer
      第52回中部化学関係学協会支部連合秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Preferred Photo-Induction of Ia3d Cubic Phase in ANBC-22/Azo Binary Mixture2021

    • Author(s)
      S. Kutsumizu, T. Kondo, M. Ogawa, Y. Misutani, Y. Miwa, Y. Yamamura, K, Saito
    • Organizer
      The 19th Optics of Liquid Crystals (OLC2021)
    • Related Report
      2021 Annual Research Report

URL: 

Published: 2021-04-28   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi