Atsuro Takai

Senior Researcher, Research Center for Macromolecules and Biomaterials, National Institute for Materials Science *Profile is at the time of the award.

2024Inamori Research GrantsScience & Engineering

Research topics
One-step synthesis of dense assembly of π-conjugated molecules for near-infrared photoelectric conversion
Keyword
Summary
Photoelectric conversion of near-infrared light using π-conjugated molecules is expected to be applied to innovative electronic devices, such as security sensors with high biocompatibility. However, the development of π-conjugated molecules that absorb near-infrared light has been hampered by their cumbersome synthesis, purification, and assembling processes on thin films. In this study, I aim to establish a simple method for fabricating organic semiconducting π-conjugated molecules that absorb at wavelengths longer than 800 nm, based on our original catalyst-free click reaction between electron-accepting π-conjugated molecules and amines.

Message

I aim to create unique organic materials by functionalizing π-conjugated molecules with my original chemical reaction. I would like to pursue my research with a sense of pride and responsibility as a member of the Seiwa Scholars Society.

Outline of Research Achievments

We discovered that a solid disk of a hydrophilic perylenediimide (PDI), a well-known near-infrared dye, is reduced on water containing a reducing agent, exhibiting spontaneous rhythmic motion on the centimeter scale. The self-propelled motion can be finely tuned by systematically changing the imide side chains and molecular orientation of the PDI. This study provides crucial insights into the molecular design of non-equilibrium systems that convert chemical energy into macroscopic kinetic energy through chemical reactions.


Lara Rae Holstein, Nobuhiko J. Suematsu et al., (2024) Reduction-Induced Self-Propelled Oscillatory Motion of Perylenediimides on Water Angewandte Chemie International Edition Vol.63 (46) https://doi.org/10.1002/anie.202410671


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