Researcher Information

Kazuki Sada


Create "Breakthrough Materials" by Manipulation of Molecular Information!

Department of Chemistry, Physical Chemistry


1) Lipophilic polyelectrolytes for oil super absorbents
2) Post-synthetic modifications of metal-organic frameworks
3) Ansiotropic materials on the basis of organic crystals
4) Creation of molecular robots
5) Controlled Polymerization via metal-organic frameworks
6) Molecular Design of LCST phase separation
7) Molecular machinary and aggregate-induced emission
8) Dynamic self-assembly on the basis of biomolecular motors

FieldSupramolecular chemistry, Crystal engineering, Polymer chemistry, Soft matter, Organic functional chemistry
KeywordSupramolecular Chemistry, Crystal engineering, Polymer chemistry, Polymer gels, Molecular assembly, Metal-organic frameworks, Stimili-sensitive polymers, Molecular information, Biomolecular motor, Self-organization, Aggregate induced emission, Organic crystals, Super absrobent polymers, Molecular recognition

Introduction of Research

Breakthrough Materials Created by Manipulation of Molecular Information is a "mixture" always bothering us? Mixture is a combination of two or more different compounds, and sometimes expresses a negative meaning due to the impurity from viewpoints of classical organic chemistry. Until now, many chemists have devoted themselves to how to purify a compound from a mixture, or synthesize and analyze a pure compound.Contrary to this trend, we aspire for a breakthrough on functions, structures, and reactions, which are achieved by elaborately mixed various components. The ultimate purpose of our research is to understand new phenomena and develop novel functional materials by mixing compounds!!
In this context, we have endeavored to control association and dissociation among compounds in order to construct hierarchal architectures in a wide range of scale from nano to millimeter by mixing multiple components, in which an ordered communication of components and/or energies spontaneously occurs.

Representative Achievements

S. Sunaga, K. Kokado, K. Sada, Lipophilic polyelectrolyte gel derived from phosphonium borate can absorb a wide range of organic solvents, Soft Matter 2018, 14, 581-585.
T. Ishiwata, A. Michibata, K. Kokado, S. Ferlay, W. Hosseini, K. Sada, Box-like gel capsule from heterostructure based on a core-shell MOF as template of crystal crosslinking, Chem. Commun. 2018, 54, 1437-1440.
K. Kokado, T. Machida, T. Iwasa, T. Taketsugu, K. Sada, Twist of C=C Bond Plays a Crucial Role in the Quenching of AIE-Active Tetraphenylethene Derivatives in Solution, J. Phys. Chem. C 2018, 122, 245-251.
J. J. Keya,R. Suzuki, A. M. R. Kabir,D. Inoue, H. Asanuma, K. Sada, H.Hess, A. Kuzuya, A.Kakugo, DNA-assisted swarm control in a biomolecular motor system, Nature Commun. 2018, 9, 453.
Organic Reaction as a Stimulus for Polymer Phase Separation, M. Naya, Y. Hamano, K. Kokado, K. Sada, ACS Macro Lett. 2017, 6, 898-902.
Academic degreePh. D.
Academic background1985 B. Sc. in Engineering, Kyoto University
1987 M. Sc. in Engineering, Kyoto University
1991 Ph. D. in Engineering, Kyoto University
1990-1995 Assistant Professor, GIfu University
1995-2002 Assistant Professor, Osaka University
2002-2010 Associate Professor, Kyushu University
2010- Professor, Hokkaido University
Affiliated academic societyThe Chemical Society of Japan, The Society of Polymer Science, Japan, American Chemical Society
Room addressFaculty of Science, Buidling 7 7-214