| 研究課題/領域番号 |
21F21337
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| 配分区分 | 補助金 |
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| 研究機関 | 国立研究開発法人理化学研究所 |
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研究代表者 |
相田 卓三 国立研究開発法人理化学研究所, 創発物性科学研究センター, グループディレクター (00167769)
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| 研究分担者 |
SU ZEBIN 国立研究開発法人理化学研究所, 創発物性科学研究センター, 外国人特別研究員
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| 研究期間 (年度) |
2021-11-18 – 2024-03-31
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| キーワード | supramolecular polymers / self-assembly / block copolymers |
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| 研究実績の概要 |
I synthesized a novel type of supramolecular monomer, which contains a carboxylate group, a guanidinium group, and two thermodynamic incompatible side chains. The carboxylate group and the guanidinium group have a strong supramolecular interaction called salt-bridge. The monomers are supramolecular polymerized via salt-bridge interaction. Furthermore, supramolecular polymers form a hierarchical structure in the solid state due to the microphase separation of two side chains. I confirmed the formation of nanoscale hierarchical structures by small angle X-ray scattering and transmission electron microscope. This result demonstrates that supramolecular polymerization can facilitate the microphase separation of polymer chains with small molecular weights and further form nanoscale structures.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
4: 遅れている
理由
The main reason I am delayed is I met many unexpected challenges. During my synthesis, I have remodified my molecular design 5 times. Because each time I met unexpected problems and difficulties. For example, my monomer contains guanidium group, it is a cationic, therefore the product is difficult to be separated by silica column and require 100% conversion for the last step. Also, the guanidine itself is unstable in the alkaline condition. The polymer part such as PDMS will be decomposed in acid condition. Many difficulties were met during my synthesis.
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| 今後の研究の推進方策 |
The investigation of precisely controlling the hierarchical structures of SBCP will focus on the following three aspects. 1) the impact of associate constants of supramolecular interactions on self-assembled structure will be investigated, particularly the threshold of associate constant required for the microphase separation of SBCP. 2) the effect of molecular architectures on the assembled structures and transformation between structures will be explored. 3) The stimulus-response of the assembled structures of SBCP under electric and magnetic fields will be analyzed, to establish the correlation between the external field and assembled structures.
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