Kenta Kokado

Research Institute for Electronic Science, Hokkaido University
Associate Professor
A01

Research AreasOrganic Chemistry, Polymer Chemistry, Supramolecular Chemistry
Participating Group (2020-2021)

Rational design of crystal transforming behavior by using anisotropically transforming soft crystals responding to external stimuli.

Keywords
Anisotropic Transformation, Gel, Porous Crystal, Artificial Muscle, Crosslink
Co-Researcher
Co-Researcher: Kazuki Sada (Faculty of Science, Hokkaido University, Professor)

Research Outline

Polymer gels are well-known to exhibit a large volumetric change, thus many researchers have explored their application for various actuators. However, the construction of polymer gels with ordered network structure, such as muscle, is still a challenging problem in the field of polymer chemistry. The researchers will develop various polymer gels with ordered network structure derived from the crystal structure of the ingredient porous crystal, metal-organic framework (MOF). Therein, the polymer gels are obtained by crosslinking of MOF with the guest molecule followed by softening of the MOF. These polymer gels can reversibly demonstrate anisotropic transforming behavior analogous to a muscle, based on the anisotropy of the original MOF crystal. The introduction of stimuli-responsivity to the crosslinker and so on will allow us to obtain an advanced smart actuator responding to various external stimuli such as heat, light, or electric field, via a bottom-up approach.

Reversibly anisotropic transformation of a soft crystal
Participating Group (2018-2019)

Development of anisotropically transforming soft crystals with stimuli-responsivity by softening porous crystals

Keywords
Porous crystals, Crosslink, Anisotropic transformation, Stimuli-responsivity, Polymer gel
Co-Researcher
Co-Researcher: Kazuki Sada (Faculty of Science, Hokkaido University, Professor)

Research Outline

TPolymer gels are well-known to exhibit a large volumetric change, thus many researchers have explored their application for various actuators. However, the construction of polymer gels with ordered network structure, such as muscle, is still a challenging problem in the field of polymer chemistry. The researchers will develop various polymer gels with ordered network structure derived from the crystal structure of the ingredient porous crystal, metal-organic framework (MOF). Therein, the polymer gels are obtained by crosslinking of MOF with the guest molecule followed by softening of the MOF. These polymer gels can reversibly demonstrate anisotropic transforming behavior analogous to a muscle, based on the anisotropy of the original MOF crystal. The introduction of stimuli-responsivity to the crosslinker and so on will allow us to obtain an advanced smart actuator responding to various external stimuli such as heat, light, or electric field, via a bottom-up approach.

Reversibly anisotropic transformation of a soft crystal

Publications

Academic papers/reviewed

A01-11

  1. "Photo‐Induced Pyramidal Inversion Behavior of Phosphines Involved with the Aggregation‐Induced Emission (AIE) Behavior" T. Machida, T. Iwasa, T. Taketsugu, K. Sada, K. Kokado, Chemistry – A European Journal, 2020, 26, 8028-8034.
  2. "Supramolecularly Designed Thermoresponsive Polymers in Different Polymer Backbones" M. Naya, K. Kokado, K. B. Landenberger, S. Kanaoka, S. Aoshima, K. Sada, Macromolecular Chemistry and Physics, 2020, 221(5), 1900455.
  3. "Metal–organic framework tethering pH- and thermo-responsive polymer for ON–OFF controlled release of guest molecules" S. Nagata, K. Kokado, K. Sada, CrystEngCommn, 2020, 22(6), 1106-1111.
  4. "Synthesis of pyramidal tetraarylborate pentads" N. Sakamoto, M. Ohta, K. Kokado, K. Sada, New Journal of Chemistry, 2019, 43(37), 14853-14858.
  5. "Step-growth copolymerization between immobilized monomer and mobile monomer in metal-organic frameworks" S. Anan, Y. Mochizuki, K. Kokado, K. Sada, Angewandte Chemie International Edition, 2019, 58(24), 8018-8023.
  6. "Post-synthetic Modification of Metal-Organic Framework through Urethane Formation" S. Anan, K. Kokado, K. Sada, Chemistry Letters, 2019, 48(3),285-287.
  7. "Control of Aggregation-Induced Emission from a Tetraphenylethene Derivative through the Components in the Co-crystal" T. Jimbo, M. Tsuji, R. Taniguchi, K. Kokado, K. Sada, Cryst. Growth Des., 2018, 18(7), 3863-3869.

Related Website(s)
Contact
kokado@es.hokudai.ac.jp