髙見澤 聡

たかみざわ さとし
Satoshi Takamizawa
横浜市立大学大学院生命ナノシステム科学研究科
教授
計画　A01
A01-02 研究代表者
専門分野材料化学・錯体化学

ソフトクリスタルの熱機械的評価手法ならびに制御手法の開拓

キーワード
有機超弾性
関連する研究者
研究分担者: 黒田玲子（中部大学総合工学研究所、特任教授）
研究協力者: 佐々木俊之（横浜市立大学大学院生命ナノシステム科学研究科、助教）

研究概要

有機固体が発現する超弾性（“有機超弾性”）を基軸としてソフトクリスタルの形態制御ならびに物性変調への展開を行う。超弾性は形状記憶合金（もしくは超弾性合金）として知られる特殊な合金の特異な物理特性としてこれまで極めて限定的に発展してきた。有機超弾性は化学に現れた新しい固体特性であり、化学的手法による超弾性研究が可能な新しいステージに入っている。本研究では(1)有機超弾性結晶の創製および手法の開拓、(2)物性評価手法の深化発展、ならびに(3)超弾性とカップルする光学物性変調特性の開拓を目指す。

有機超弾性による力強い形状回復特性

代表的な研究業績

  • Shape-Memory Effect in an Organosuperelastic Crystal
    Takamizawa, S.; Takasaki, Y. Chem. Sci. 2016, 7, 1527–1534.
    DOI: 10.1039/C5SC04057D
  • Dynamic Gas-Inclusion in a Single Crystal
    Takamizawa, S. Angew. Chem. Int. Ed. 2015, 54, 7033–7036.
    DOI: 10.1002/anie.201500884
  • Superelastic Organic Crystals
    Takamizawa, S.; Miyamoto, Y. Angew. Chem. Int. Ed. 2014, 53, 6970–6973.
    DOI: 10.1002/anie.201311014

研究業績

種別

査読付発表論文

  1. "A phase-diagram rationalization of thermally and mechanically triggered multiple mechanical responses of an organic crystal” E. R. Engel and *S. Takamizawa, Cryst. Growth Des., 22, 1229–1236 (2022)
    DOI: 10.1021/acs.cgd.1c01192
  2. "Two-Dimensional Organoferroelasticity in a Single Crystal of 4-Iodoaniline” S. Ranjan and *S. Takamizawa, Crystal Cryst. Growth Des., 22, 1831–1836 (2022,).
    DOI: 10.1021/acs.cgd.1c01394
  3. "Four Directional Twinning Deformation of an Anisotropic Molecular Single Crystal Based on Three Different Modes of Mechanical Twinning” T. Sasaki, S. Sakamoto, *S. Takamizawa, Crystal Growth & Des., 22, 174-179 (2022)
    DOI: 10.1021/acs.cgd.1c00763
  4. "Characterization of Organoferroelasticity in a TEMPO Crystal” S. Ranjan and *S. Takamizawa, Cryst. Growth Des., 22 585–589 (2022).
    DOI: 10.1021/acs.cgd.1c01141
  5. “Thermal Diffusivity of Organosuperelastic Soft Crystals during Stress-Induced Phase Transition” M. Ryu1, S. Takamizawa, *J. Morikawa, Appl. Phys. Lett., 119, 251902 (2021).[7 pages] (領域内共同研究　A03公募 森川)
    DOI: 10.1063/5.0055707
  6. "Perpendicularly Oriented Dual Organosuperelasticity Correlated with Molecular Symmetry” T. Sasaki, S. Ranjan, *S. Takamizawa, Cryst. Growth & Des., 21, 3902-3907 (2021).
    DOI: 10.1021/acs.cgd.1c00210
  7. "An Organosuperelastic Mechanism with Bending Molecular Chain Bundles Crystal” T. Sasaki, S. Sakamoto, E. R. Engel, *S. Takamizawa, Cryst. Growth & Des., 21(5) 2920-2924 2021
    DOI: 10.1021/acs.cgd.1c00089
  8. "A Photoluminescent Organosuperelastic Crystal of 7-Amino-4-methylcoumarin” T. Sasaki, S. Ranjan, *S. Takamizawa, CrystEngComm, 23, 5801-5804 (2021).
    DOI: 10.1039/D1CE00359C
  9. "Versatile Organosuperelastic Deformability by Multiple Mechanical Twinning" T. Sasaki, K. Nishizawa, *S. Takamizawa, Cryst. Growth Des., 2021, 2453-2458
    DOI: 10.1021/acs.cgd.1c00054
  10. "Twinning-Based Organosuperelasticity and Chirality in a Single Crystal of an Achiral Donor–Acceptor Type Schiff Base Induced by Charge-Transfer Interactions" T. Sasaki, S. Sakamoto, *S. Takamizawa, Cryst. Growth Des., 20, 8079-8083 (2020).
    DOI: 10.1021/acs.cgd.0c01041
  11. "Organoferroelasticity Mediated by Water of Crystallization" T. Sasaki, *S. Takamizawa, Cryst. Growth Des., 20, 6990-6994 (2020).
    DOI: 10.1021/acs.cgd.0c01041
  12. "Temperature-Diversified Anisotropic Superelasticity and Ferroelasticity in a 3-Methyl-4-Nitrobenzoic Acid Crystal" Y. Takasaki, T. Sasaki, S. Sakamoto, Y. Takasaki, *S. Takamizawa, Cryst. Growth Des., 20, 6211-6216 (2020).
    DOI: 10.1021/acs.cgd.0c00964
  13. "Flash Shape-Memorization Processing and Inversion of a Polar Direction in a Chiral Organosuperelastic Crystal of 1,3,5-Tricyanobenzene" T. Sasaki, S. Sakamoto, *S. Takamizawa, Cryst. Growth Des., 20, 4621-4626 (2020).
    DOI: 10.1021/acs.cgd.0c00431
  14. "Strictly Regulated Two-Dimensional Slippage in a Lamellar Single Crystal of 5-Fluorouracil" T. Sasaki, Y. Miyamoto, *S. Takamizawa, Cryst. Growth Des., 20, 4779-4782 (2020).
    DOI: 10.1021/acs.cgd.0c00535
  15. "Ferroelasticity with a Biased Hysteresis Loop in a Co-Crystal of Pimelic Acid and 1,2-Di(4-pyridyl)ethane" T. Sasaki, S. Sakamoto, K. Nishizawa, *S. Takamizawa, Cryst. Growth Des., 20, 3913-3917 (2020).
    DOI: 10.1021/acs.cgd.0c00221
  16. "Organoferroelastic Crystal Prepared by Supramolecular Synthesis" T. Sasaki, S. Sakamoto, S. Takamizawa, Cryst. Growth Des., 20, 1935-1939 (2020).
    DOI: 10.1021/acs.cgd.9b01606
  17. "A Multidirectional Superelastic Organic Crystal by Versatile Ferroelastical Manipulation" T. Sasaki, S. Sakamoto, Y. Takasaki, *S. Takamizawa, Angew. Chem. Int. Ed., 59, 4340-4343 (2020).
    DOI: 10.1002/anie.201914954
  18. "Twinning Organosuperelasticity of a Fluorinated Cyclophane Single Crystal" T. Sasaki, S. Sakamoto, *S. Takamizawa, Cryst. Growth Des., 19, 5491-5493 (2019).
    DOI: 10.1021/acs.cgd.9b00917
  19. "Shape Rememorization of an Organosuperelastic Crystal via Superelasticity-Ferroelasticity Interconversion" S. Sakamoto, T. Sasaki, A. Sato-Tomita, *S. Takamizawa, Angew. Chem. Int. Ed., 58, 13722-13726 (2019). (領域内共同研究　A02-03 佐藤)
    DOI: 10.1002/ange.201905769
  20. "Controllability of coercive stress in organoferroelasticity by the incorporation of a bulky flipping moiety in molecular crystals" S. H. Mir, Y. Takasaki, E. R. Engel, *S. Takamizawa, CrystEngComm, 20, 3807-3811 (2018).
    DOI: 10.1039/C8CE00295A
  21. "Enhancement of dissipated energy by large bending of an organic single crystal undergoing twinning deformation" S. H. Mir, Y. Takasaki, E. R. Engel, *S. Takamizawa, RSC Advances, 8, 21933-21936 (2018).
    DOI: 10.1039/C8RA02499E
  22. "Versatile ferroelastic deformability in an organic single crystal by twinning about a molecular zone axis" E. R. Engel, *S. Takamizawa, Angew. Chem. Int. Ed., 57, 11888-11892 (2018).(Cover Picture)
    DOI: 10.1002/anie.201803097
  23. "Superplasticity in an organic crystal" *S. Takamizawa, Y. Takasaki, T. Sasaki, N. Ozaki, Nature Commun., 9, 3984 (2018).(プレスリリース)
    DOI: 10.1038/s41467-018-06431-7
  24. "Versatile Shape Recoverability of Odd-Numbered Saturated Long-Chain Fatty Acid Crystals" *S. Takamizawa, Y. Takasaki, Cryst. Growth Des., 19, 1912-1920 (2019).
    DOI: 10.1021/acs.cgd.8b01890
  25. "Twinning ferroelasticity facilitated by the partial flipping of phenyl rings in single crystals of 4,4-dicarboxydiphenyl ether" R. E. Engel, Y. Takasaki, H. S. Mir, *S. Takamizawa, R. Soc. Open Sci., 5, 171146 (2018).
    DOI: 10.1098/rsos.171146
  26. "An organoferroelasticity driven by molecular conformational change" H. S. Mir, Y. Takasaki, *S. Takamizawa, Phys. Chem. Chem. Phys., 20, 4631-4635 (2018).(Cover)
    DOI: 10.1039/C7CP07206F
  27. "Ferroelasticity in an organic crystal: a macroscopic and molecular level study" H. S. Mir, Y. Takasaki, R. E. Engel, *S. Takamizawa, Angew. Chem. Int. Ed., 56, 15882-15885 (2017).(VIP paper、Inside Cover)
    DOI: doi.org/10.1002/anie.201707749

報道・アウトリーチ活動・特許・その他

  1. プレスリリース「有機超弾性結晶の発光クロミズム〜小さな力で分子配列を変換し発光色の可逆制御を有機結晶で実現〜」(領域内共同研究A01-01務台)（2020.4.14）
  2. 超弾性材料およびその使用、特願2018-189482、高見澤聡・高崎祐一、国内、外国出願無
  3. 名称：超弾性材料およびその使用　出願日：2018.10.4　特願：特願2018-189482　発明者：高見澤 聡, 高崎 祐一　出願者：公立大学法人横浜市立大学, KISTEC　国名：日本シュツガンビ

国際学会発表

  1. "Discovery of Superelasticity and Shape-memory Effect in Organic Crystals" S. Takamizawa (Invited), International Conference On Martensitic Transformations (ICOMAT 2017) (Chicago, USA, Jul. 9-14, 2017)
  2. "Organosuperelasticity: New Physical Element in Chemistry" S. Takamizawa (Invited), The 23rd International Conference on the Chemistry of the Organic Solid State (ICCOSS XXII) (Stellenbosch, Republic of South Africa, Apr. 2-7, 2017)
  3. S. Takamizawa, "Discovery of Superelasticity and Shape-memory Effect in Organic Crystals" ICOMAT 2017 (International Conference on Martensitic Transformations) , Chicago, US, Jul. 9-14, 2017 . Invited speaker
  4. S. Takamizawa, “Organosuperelasticity: New physical element in chemistry” ICCOSS XXIII (23rd International Conference on Chemistry of the Organic Solid State), Stellenbosch, South Africa, Apr. 2-7, 2017．Invited speaker
関連ウェブサイト
連絡先
staka [at] yokohama-cu.ac.jp