Creation of self-assembled mesoscale chainmail and application
| Project/Area Number |
22K20526
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Multi-year Fund |
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| Review Section |
0501:Physical chemistry, functional solid state chemistry, organic chemistry, polymers, organic materials, biomolecular chemistry, and related fields
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| Research Institution | Chiba University |
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Principal Investigator |
DATTA SOUGATA 千葉大学, 大学院工学研究院, 特任研究員 (60965036)
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| Project Period (FY) |
2022-08-31 – 2024-03-31
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| Project Status |
Completed (Fiscal Year 2023)
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| Budget Amount *help |
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | supramolecular polymer / nanotroid / barbiturate / secondary nucleation / catenane / nanostructures / topological structures / mechanical bonding / self-assembly / supramolecular chemistry / Supramolecular Polymer / 2D-Nanomaterial / Interlocked Assembly / Ring / Interfacial Synthesis |
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| Outline of Research at the Start |
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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| Outline of Annual Research Achievements |
In the last fiscal year, we made an effort to compare the impact of terminal elongation and secondary nucleation-elongation in seeded supramolecular polymerization, which is crucial in studying the mechanism of mesoscale chainmail formation. Previously, to probe the mechanism of catenation of nanotoroids of diphenyl naphthalene barbiturates, we performed seeding experiments just below the nucleation temperature wherein spontaneous nucleation was delayed. Although toroidal seeds of the molecule remained stable in this supersaturated condition, helicoidal fiber seeds dissociated due to the presence of termini. To address this problem, we synthesized a new barbiturate containing quinoline in place of naphthalene. The new molecule tends to self-assemble more weakly than the previously studied barbiturates due to the presence of the electron-deficient quinoline unit, and thereby its spontaneous nucleation was suppressed enough even under ambient conditions where both closed and open-ended seeds remained stable. Seeding experiments under this condition using the two types of seeds allowed us to demonstrate the distinct kinetics of terminal elongation and secondary nucleation-elongation. We observed that open-ended helicoidal seeds induced terminal elongation leading to the formation of elongated helicoidal fibers. On the other hand, the closed-ended toroidal seeds induced secondary nucleation on their surface covered with alkyl chains, affording random coil structures. These results have been published in a paper recently.
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Report
(2 results)
Research Products
(7 results)
