| 研究課題/領域番号 |
22K20526
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| 研究種目 |
研究活動スタート支援
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| 配分区分 | 基金 |
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| 審査区分 |
0501:物理化学、機能物性化学、有機化学、高分子、有機材料、生体分子化学およびその関連分野
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| 研究機関 | 千葉大学 |
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研究代表者 |
DATTA SOUGATA 千葉大学, 大学院工学研究院, 特任研究員 (60965036)
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| 研究期間 (年度) |
2022-08-31 – 2024-03-31
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| 研究課題ステータス |
交付 (2022年度)
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| 配分額 *注記 |
2,860千円 (直接経費: 2,200千円、間接経費: 660千円)
2023年度: 1,430千円 (直接経費: 1,100千円、間接経費: 330千円)
2022年度: 1,430千円 (直接経費: 1,100千円、間接経費: 330千円)
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| キーワード | nanostructures / topological structures / mechanical bonding / self-assembly / supramolecular chemistry / Supramolecular Polymer / 2D-Nanomaterial / Interlocked Assembly / Ring / Interfacial Synthesis |
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| 研究開始時の研究の概要 |
This research is a vital step for creating chainmail-type mesoscale architectures, thereby offering opportunities for future exploration of the properties of a new generation of 2D nanomaterials. This project will advance the area of 2D molecular architectonics toward mesoscale robotics.
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| 研究実績の概要 |
In the last fiscal year, we made our effort toward controlling of catenation of nanotoroids, which is crucial for the creation of mesoscale chainmail. The catenation relies on the size of the void of the nanotoroids and the secondary nucleation on their surface. We faced difficulty to control these factors using the proposed polar molecule. So, we worked on the barbituric acid-based nonpolar molecular design used in the preparation of polycatenanes in our laboratory. Since the corresponding nanotoroids are covered with alkyl chains of the barbiturate monomer, we increased the alkyl chain length of the molecule to prepare nanotoroids with a larger void space and with a higher frequency of secondary nucleation on their surface. Strikingly, atomic force microscopy and small-angle X-ray scattering experiments revealed a decrease in the inner void space of nanotoroids. Spectroscopic studies revealed increased efficiency of secondary nucleation on the surface of these nanotoroids. Interestingly, a combination of these two effects resulted in a higher yield of nano-[2]catenane and suppressed the formation of oligocatenanes. These preliminary results have been published in a paper recently.
Stimulated by the aforementioned surprising observation, we plan to investigate the detailed mechanism of the size modulation of the nanotoroids and its effect on the catenation in the near future.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
The suppression of oligocatenation due to a decrease in the size of void space of the nanotoroids that were obtained by elongation of alkyl chain length is an unexpected discovery. Since our original target was the creation of mesoscale chainmail, we are synthesizing barbituric acid-based molecules with shorter alkyl chains to prepare nanotoroids with larger void space to allow catenation of multiple fibers, necessary in the formation of chainmail.
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| 今後の研究の推進方策 |
After finishing the synthesis of barbituric acid-based molecules with shorter alkyl chain lengths, we will investigate the mechanism of variation of the size of the nanotoroids upon variation of alkyl chain length using spectroscopic experiments and theoretical calculation. The suitability for accommodating four fibers in the inner void space of the nanotoroids will be probed by atomic force microscopy and small-angle X-ray scattering experiments. Once a suitable match is found, it will be employed in two-dimensional catenation to create mesoscale chainmail. Importantly, although a decrease in the alkyl chain length produces nanotoroids with larger void space, the efficiency of secondary nucleation on the surface of the nanotoroids is expected to decrease. However, it can be compensated by using a suitable solvent that induces more solvophobic interactions. We also aim to utilize the chainmail structure in the transportation of mesoscale guests.
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