Researcher Information

SUZUKI Takanori


From Hokkaido to Top Organic Chemistry in the World

Department of Chemistry, Organic and Biological Chemistry


Studies on Dynamic Redox Systems: Construction of Record-breaking Strained Compounds and Development of Unimolecular Memory

FieldStructural Organic Chemistry, Organic Chemistry, Physical Organic Chemistry
KeywordHighly strained compounds, Dynamic Redox systems, Electrochromism, Mechanochromism, Dication, Hyper covalent bond

Introduction of Research

The carbon–carbon covalent bond is one of the most basic concept in organic chemistry. Bond length, bond angle, and torsion angle among carbon atoms are nearly constant on the basis of their hybrid orbitals. On the other hand, highly strained hydrocarbons such as sterically-congested and/or curved polycyclic aromatic hydrocarbons as well as cyclic π-conjugated molecules have attracted much attention with regard to their characteristic features. We focused on two types of redox-active molecules with a extremely elongated C-C single bond (Hyper covalent bond with a bond length beyond 1.8 Å) or a strained double bond, for which unique electrochromic behavior was observed upon oxidation to give deeply colored cationic species.

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Representative Achievements

Chalcogen Bond versus Halogen Bond: Changing Contributions in Determining the Crystal Packing of Dihalobenzochalcogenadiazoles.
Y. Ishigaki, K. Shimomura, K. Asai, T. Shimajiri, T. Akutagawa, T. Fukushima, T. Suzuki
Bull. Chem. Soc. Jpn. 2022, 95, 522-531.
Generation of hydroxyl radical-activatable ratiometric near-infrared bimodal probes for early monitoring of tumor response to therapy.
L. Wu, Y. Ishigaki, W. Zeng, T. Harimoto, B. Yin, Y. Chen, S. Liao, Y. Liu, Y. Sun, X. Zhang, Y. Liu, Y. Liang, P. Sun, T. Suzuki, G. Song, Q. Fan, D. Ye
Nat. Commun. 2021, 12, 6145.
Redox-active Tetraaryldibenzoquinodimethanes.
Y. Ishigaki, K. Sugawara, T. Tadokoro, Y. Hayashi, T. Harimoto, T. Suzuki
Chem. Commun. (Feature Article) 2021, 57, 7201-7214.
Hysteretic Three-State Redox Interconversion among Zigzag Bisquinodimethanes with Non-fused Benzene Rings and Twisted Tetra-/Dications with [5]/[3]Acenes Exhibiting Near-Infrared Absorptions.
Y. Ishigaki, T. Harimoto, K. Sugawara, T. Suzuki
J. Am. Chem. Soc. 2021, 143, 3306-3311.
Expandability of the Covalent Bond: A New Facet Discovered in Extremely Long Csp3-Csp3 Single Bonds.
Y. Ishigaki, Y. Uchimura, T. Shimajiri, T. Suzuki
Bull. Chem. Soc. Jpn. (Award Account) 2021, 94, 1385-1393.

Related industries

Functional Materials, Molecular Device
Academic degreePh.D.
Academic background1984 B.S. Department of Chemistry, Faculty of Science, Tohoku University
1986 M.S. Department of Chemistry, Graduate School of Science, Tohoku University
1988 Ph.D. Department of Chemistry, Graduate School of Science, Tohoku University
1988-1989 JSPS Research Fellow (PD), Tohoku University
1989-1994 Assistant Professor, Department of Chemistry, Faculty of Science, Tohoku University
1995-2002 Associate Professor Department of Chemistry, Faculty of Science, Hokkaido University
2002- Professor, Department of Chemistry, Faculty of Science, Hokkaido University
Affiliated academic societyThe Chemical Society of Japan, The Society of Physical Organic Chemistry, Japan, The Society of Synthetic Organic Chemistry, Japan
Room addressScience Building 6 #6-504