静岡大学 関朋宏 研究室

関朋宏 研究室

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Publications

2022

81. Mechanical Deformation and Multiple Thermal Restoration of Organic Crystals: Reversible Multi-Stage Shape-Changing Effect with Luminescence-Color Changes,
C. Feng, T. Seki, S. Sakamoto, T. Sasaki, S. Takamizawa, H. Ito,
Chem. Sci., 2022, in press
DOI: 10.1039/D2SC03414J.
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Abstract

Shape-memory materials can be mechanically deformed and subsequently reverse the deformation upon changing the temperature. Shape-memory materials have attracted considerable attention for basic research and industrial applications, and polymer and alloy shape-memory materials have been well studied; however, it is formidably challenging to develop functional shape-memory materials, such as materials with multi-stage and anisotropic shape changes and shape changes accompanied by changes in color and light emission. Here, we found a reversible multi-stage shape-changing effect after mechanical deformation in a molecular crystal induced by multi-step thermal phase transitions with reversible shape changes and luminescence-color changes. Using single-crystal structure and thermal analyses as well as mechanical property measurements, we found that the reversible multi-stage shape-changing effect was achieved by a combination of a twinning deformation and multi-step thermal phase transitions. The changes in the crystal shape and luminescence suggest novel strategies for imparting known shape-memory materials with additional functionalities.

2021

80. Functional Flexible Molecular Crystals: Intrinsic and Mechanoresponsive Properties,
T. Seki, N. Hoshino, Y. Suzuki, S. Hayashi,
CrystEngComm, 2021, 23, 5686–5696
DOI: 10.1039/D1CE00388G.
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79. (9-Isocyanoanthracene)gold(I) Complexes Exhibiting Two Modes of Crystal Jumps by Different Structure Change Mechanisms,
K. Kato, T. Seki, H. Ito,
Inorg. Chem, 2021, 60, 10849–10856
DOI: 10.1021/acs.inorgchem.1c00881.
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78. Synthesis and Optical Properties of C,N-Swapped Boranils Derived from Potassium Acyltrifluoroborates,
S. Matsuura, J. Taguchi, T. Seki, H. Ito,
Bull. Chem. Soc. Jpn., 2021, 94, 1547–1552
DOI: 10.1246/bcsj.20210024.
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