报告题目：Reversible Self-catalytic Reactions

What is Chemical Reaction?

报 告 人：Masahiko Yamaguchi  

大连理工大学 教授

日本东北大学 终身荣誉教授

时   间：2022年9月13日 13：30-15：00

地   点：仓前校区 勤园17号楼210会议室

邀 请 人：陆天尧 教授

报告人简介：

BSc (1977) and PhD degrees (1982), The University of Tokyo (supervisor, Professor T. Mukaiyama)

Assistant professor (1982-1985), Kyushu Institute of Technology.

Associate professor (1985-1991), Kyushu Institute of Technology.

Post doctorate fellow (1987-1988), Yale University with Professor S. Danishefsky.

Associate professor (1991-1997), Tohoku University, Department of Chemistry.

Professor (1997-1999), Tohoku University, Faculty of Pharmaceutical Sciences.

Professor (1999-2020), Tohoku University, Graduate School of Pharmaceutical Sciences

Professor (2006-2012), Tohoku University, Graduate School of Science

Professor (2020–present), Dalian University of Technology

The Chemical Society of Japan Award for Young Chemists in 1986

The Synthetic Organic Chemistry Award, Japan in 2007

The Chemical Society of Japan Award in 2016.

报告摘要：

Discussed here are chemical reactions containing positive feedback of self-catalytic reactions using synthetic organic molecules containing helicenes, in which a product catalyzes the reaction of substrates to become the product.¹ The reaction rate increases with progress, because the product, which is also a catalyst, increases. The reaction can be described by macroscopic mechanisms of the statistical mechanics and microscopic mechanisms of the quantum mechanics, the former of which is essential. Various notable chemical phenomena appear due to high sensitivity of self-catalytic reaction to environmental changes, which include thermal hysteresis, temperature threshold, concentration threshold, memory effect, and stable and unstable concentration oscillations. Competition of two self-catalytic reactions exhibits still complex chemical phenomena such as sensing temperature increase/decrease states, spatial heterogeneity, and chiral symmetry breaking.² Concept of input/concentration output system processed by chemical reactions involving self-catalytic reactions is also discussed.³

References

1.     Yamaguchi, M. Acc. Chem. Res. 2021, 54, 2603−2613.

2.     Sawato, T.; Saito, N.; Yamaguchi, M. ACS Omega 2019, 4, 5879−5899.

3.     Zhang, S.; Bao, M.; Yamaguchi, M. Reactions 2022, 3, 89–117.