光に応答するミクロ孔を利用した異方的能動輸送膜の開発
| Project/Area Number |
15J10616
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| Research Category |
Grant-in-Aid for JSPS Fellows
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| Allocation Type | Single-year Grants |
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| Section | 国内 |
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| Research Field |
Organic and hybrid materials
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| Research Institution | The University of Tokyo |
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Principal Investigator |
黄 虎彪 東京大学, 工学系研究科, 特別研究員(DC1)
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| Project Period (FY) |
2015-04-24 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2017: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2016: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2015: ¥1,000,000 (Direct Cost: ¥1,000,000)
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| Keywords | crystallization / topological defect / real-time observations / mass transport / Azobenzene / Metal-organic frameworks / gas soprtion / polarity / photomoduable / diffusion rate constant / Photoresponsive / MOFs / Photo-isomerization / Polarity alteration / Photoprobe / Gas adsorption |
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| Outline of Annual Research Achievements |
This research project in this year is originated from a serendipitous discovery. A topological defect-directed nucleation and growth of a porphyrin-based core-shell-like microstructure (PorMOF) is discovered with the aid of in situ optical microscopic observations. The key points are summarized as follows:
1.A unique crystallization pathway of a porphyrin-based crystalline microstructure with a core-shell morphology is discovered in one-pot synthesis of zinc nitrate hexahydrate, 4,4’-azopyridine (AzoPy) and 4,4’,4’’,4’’’-(porphine-5,10,15,20-tetrayl)tetrakis(benzoic acid) (2HPor) in DMF / EtOH (v / v = 3:1) in a quartz cell (1 mm × 10 mm) at 64°C.
2.The morphologies and structures of this crystalline microstructure are characterized by scanning electron microscopy, transmission electron microscopy and atomic force microscopy and X-ray diffraction analysis.
3.The mechanism of this crystalline microstructure formation is established based on in situ optical microscopic observations that a topological defects pinned at the center of shell crystals directs and triggers the nucleation and growth of a new crystalline phase because of a lower energy barrier.
4.Such a crystalline microstructure exhibits unique photophysical properties that the shell part imposes a remarkable impact on the fluorescence emission of the corresponding core part that locates in the center of the shell. More specifically, the shell can quench the fluorescence of the core; and if the core crystal is released from the shell part, anisotropic fluorescence emission is observed.
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| Research Progress Status |
29年度が最終年度であるため、記入しない。
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| Strategy for Future Research Activity |
29年度が最終年度であるため、記入しない。
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Report
(3 results)
Research Products
(8 results)
