Professor Takanori Suzuki

Prof. Takanori Suzuki is a chemist at Hokkaido University, Japan. His research looks at the construction of record-breaking strained compounds and the development of unimolecular memory.

Theme: Studies on Dynamic Redox Systems: Construction of Record-breaking Strained Compounds and Development of Unimolecular Memory
Field: Structural Organic Chemistry, Organic Chemistry, Physical Organic Chemistry
Keyword: Highly 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.

Representative Achievements

  • Switching of Redox Properties Triggered by a Thermal Equilibrium between Closed-shell Folded and Open-shell Twisted Species. Y. Ishigaki, T. Hashimoto, K. Sugawara, S. Suzuki, T. Suzuki. Angew. Chem. Int. Ed., in press. DOI: 10.1002/anie.201916089
  • Hexaarylbutadiene: a versatile scaffold with tunable redox properties towards organic near-infrared electrochromic material. Y. Ishigaki, T. Harimoto, K. Sugimoto, L. Wu, W. Zeng, D. Ye, T. Suzuki. Chem. Asian J202015, 1147-1155. DOI: 10.1002/asia.201901816
  • Photo- and Thermal Interconversion of Multiconfigurational Strained Hydrocarbons Exhibiting Completely Switchable Oxidation to Stable Dicationic Dyes. Y. Ishigaki, Y. Hayashi, T. Suzuki. J. Am. Chem. Soc. 2019141, 18293-18300. DOI: 10.1021/jacs.9b09646
  • Two-way Chromic Systems Based on Tetraarylanthraquinodimethanes: Electrochromism in Solution and Mechanofluorochromism in a Solid State. Y. Ishigaki, K. Sugawara, M. Yoshida, M. Kato, T. Suzuki. Bull. Chem. Soc. Jpn201992, 1211-1217. DOI: 10.1246/bcsj.20190094
  • Longest C–C Single Bond among Neutral Hydrocarbons with a Bond Length beyond 1.8 Å. Y. Ishigaki, T. Shimajiri, T. Takeda, R. Katoono, T. Suzuki. Chem 20184, 795-806. DOI: 10.1016/j.chempr.2018.01.011

Academic background

1984 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

 

Languages: 
English
Japanese
Academic discipline: 
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