| Project/Area Number |
21K14671
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 35010:Polymer chemistry-related
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| Research Institution | Kanazawa University |
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Principal Investigator |
Sandip Das 金沢大学, ナノ生命科学研究所, 特任助教 (00873407)
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| Project Period (FY) |
2021-04-01 – 2023-03-31
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| Project Status |
Completed (Fiscal Year 2022)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2022: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2021: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | Helical Polymer / Atomic Force Microscopy / helical polymer / Atomic force microscopy / ポリジフェニルアセチレン / らせん高分子 / 2次元結晶 / ＡＦＭ |
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| Outline of Research at the Start |
Ordered two dimensional (2D) crystal structure of chiral polymers on solid substrates designated as “nano-pattern” will be fabricated by the self-assembly of helical poly(diphenylacetylene)s (PDPAs), which is still very challenging. For this purpose, high molecular weight PDPAs will be synthesized by using new catalysts and the fabricated novel “nano-pattern” will be characterized thoroughly by atomic force microscopy (AFM). Finally, the proposed materials will be used for various sophisticated applications like precision polymerization, asymmetric catalysis etc.
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| Outline of Final Research Achievements |
For the fabrication of ordered two dimensional (2D) crystal structure of chiral macromolecules on solid substrates through structural characterization of helical polymers are essential. To address the above issues, the helical structures of poly(diphenylacetylene)s (PDPAs) bearing optically active substituents linked through amide bonds and with a helicity memory have been visualised directly using high resolution atomic force microscopy (AFM). The PDPAs self-assembled into a short-range, ordered 2D monolayer on highly oriented pyrolytic graphite (HOPG) substrates upon exposure to solvent vapour, whose helical pitch and handedness (right- and left-handed) has been revealed for the first time with molecular resolution.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究において、世界で初めてポリジフェニルアセチレンの立体構造をAFMによって観察することができた。この結果は、キラルマテリアルとして有用なポリジフェニルアセチレンの分子設計に大いに役立つ。また、関連するポリジフェニルアセチレン誘導体の立体構造も明らかに出来た事から、その学術的意義は大変高い。また、本研究はAFM測定法の研究分野と高分子化学の研究分野との融合研究であり、学際的な観点からも意義は高い。
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