| Project/Area Number |
20K22554
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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 |
0502:Inorganic/coordination chemistry, analytical chemistry, inorganic materials chemistry, energy-related chemistry, and related fields
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Project Period (FY) |
2020-09-11 – 2022-03-31
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| Project Status |
Completed (Fiscal Year 2021)
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| Budget Amount *help |
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | Metal-organic polyhedra / Porous material / Composite material / Polyoxometalate / Enzyme immobilization / Metal-organic polyhedron / Supra-molecular assembly / porous materials / ionic solids / Metal-Organic Polyhedra / Porous materials / self-assembly |
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| Outline of Research at the Start |
In this project, I will use metal-organic polyhedra (MOPs) as elementary porous bricks, in order to build extended structures through their modular assembly. Focus will be given on the surface chemistry of MOPs, as-well-as on the driving forces toward supra-MOP assembly. MOPs’ outer surface can be easily functionalized by coordination of ligands, allowing for instance their compatibilization in host matrices such as silica. In addition, other interactions such as hydrophobic/hydrophilic or coulombic interactions will be investigated as a way to reach organized porous structures.
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| Outline of Final Research Achievements |
This project involved the use of metal-organic polyhedra (MOPs) as elementary building block with porosity for the preparation of functional composite materials. I mainly focused on the use of ionic MOPs, using electrostatic interactions as the main mode of assembly with diverse objects. In particular, I focused on the assembly of MOPs with polyoxometalates (POMs) and with enzymes.
Thanks to their high symmetry, POMs formed crystalline network when assembled with MOPs. The structure could be modulated by adjusting either POM nature/charge and MOP shape. The resulting materials maintained POM activity (e.g. as redox-active material or catalyst), while benefitting from the MOPs' porosity.
Enzymes were also immobilized by co-assembly with MOPs. This required the development of a reliable water-based MOP chemistry, that allowed the assembly in extremely mild conditions. Diverse enzymes, either positively or negatively charged, where immobilized, and maintained a high catalytic activity.
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| Academic Significance and Societal Importance of the Research Achievements |
At a fundamental level, this project helped understanding the modes of assembly between MOPs and diverse nanometer-sized object. Focusing on applicability, it also lead to the preparation of highly active composites, benefitting from improved performances thanks to MOPs' porosity.
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