2022 Fiscal Year Annual Research Report
錯体ナノ空間が可能にする窒素含有ラダー高分子の精密合成と機能開拓
| Project/Area Number |
22J14553
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| Allocation Type | Single-year Grants |
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| Research Institution | The University of Tokyo |
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Principal Investigator |
ZHANG Xiyuan 東京大学, 新領域創成科学研究科, 特別研究員(DC2)
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| Project Period (FY) |
2022-04-22 – 2024-03-31
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| Keywords | Polyacrylonitrile / Metal-Organic Frameworks / Ladder polymer |
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| Outline of Annual Research Achievements |
This research proposal aims to explore the synthesis and potential applications of nitrogen-doped conjugated ladder polymers (LPs) within coordination nanochannels. Nitrogen-doped conjugated LPs are anticipated to exhibit promising optical and electronic properties due to their extended conjugated and doped structures. However, LPs synthesized using traditional methods inevitably suffer from defects, such as crosslinking and single-stranded bonds, limiting their applicability. In this study, I propose to synthesize defect-free LPs within coordination nanochannels using Metal-Organic Frameworks (MOFs). The confined nanochannels could prevent interchain interaction and facilitate the extension of polymer chains promoting the formation of long conjugated defect-free LPs. After the synthesis of LPs, I will also explore methods for solubilizing and processing them using deep eutectic solvent (DES). Based on the dissolution, I will investigate the physical properties of the defect-free LPs and explore their potential in device fabrication.
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| Current Status of Research Progress |
Current Status of Research Progress
1: Research has progressed more than it was originally planned.
Reason
This research focuses on the synthesis and potential applications of nitrogen-doped conjugated ladder polymers (LPs) within the coordination nanochannels of Metal-Organic Frameworks (MOFs). In 2022, I successfully completed a project on the "Thermal transformation of polyacrylonitrile accelerated by the formation of ultrathin nanosheets in MOFs." This project resulted in the synthesis of a unimolecularly thick 2D-PAN nanosheet, which exhibited good solubility in organic solvents. Using this 2D-PAN nanosheet, 2D-LP was synthesized, displaying high aromaticity and long conjugation due to the unique conformation of 2D-PAN. Consequently, carbon materials derived from 2D-LP also exhibited high structural regularity. These results suggest that the obtained 2D-LP holds great promise for device applications. Moving forward, I plan to investigate methodologies for processing defect-free LPs, further expanding their potential applications.
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| Strategy for Future Research Activity |
The application of the obtained LPs has been challenging due to their large molecular size and rigid backbone, which prevent them from dissolving in traditional organic solvents. To overcome this difficulty, I plan to explore methods for solubilizing and processing LPs. This year, I will investigate the use of deep eutectic solvents (DES) as a potential solvent for LPs, as their hydrogen bond interactions and Coulomb interactions may facilitate dissolution. To study the solution properties of LPs, I will conduct measurements using IR, UV-Vis, and DLS techniques. Once the LPs are dissolved, I aim to perform electrochemical deposition to fabricate thin films. Following this step, I will employ Raman, SEM, AFM, and GIXRD to evaluate the quality and characteristics of the resulting thin films. By addressing these challenges, I hope to expand the potential applications of LPs and unlock their full potential.
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Research Products
(3 results)
