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Synthesis and Characterization of Functionalized Metal-organic Frameworks
Published on: September 5, 2014
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A robust hollow metal-organic framework with enhanced diffusion for size selective catalysis
Chunhui Wu1, Xiaowen Zhao1, Dongxu Wang1
1School of Physical Science and Technology, ShanghaiTech University Shanghai 201210 People's Republic of China litao1@shanghaitech.edu.cn.
Chemical Science
|December 12, 2022
Summary
Chemically stable single crystalline hollow metal-organic frameworks (MOFs) were synthesized. These robust MOF-801(h) materials efficiently host catalysts for selective chemical reactions.
Area of Science:
- Materials Science
- Nanotechnology
- Catalysis
Background:
- Single crystalline (SC) hollow metal-organic frameworks (MOFs) are promising hosts for catalysts.
- Synthesizing chemically robust SC hollow MOFs remains a significant challenge.
Purpose of the Study:
- To develop a defect-free and chemically stable SC hollow MOF, MOF-801(h).
- To demonstrate the utility of MOF-801(h) as a host for nanoparticle catalysts in size-selective reactions.
Main Methods:
- Templated growth of MOF-801 shell around a UiO-66 core.
- Selective etching of the UiO-66 core using formic acid.
- Encapsulation of platinum (Pt) and gold (Au) nanoparticles within the hollow MOF structure.
Main Results:
- Successfully synthesized defect-free, chemically stable MOF-801(h) via selective core etching.
- Pt⊂MOF-801(h) demonstrated accelerated, size-selective hydrogenation of nitro compounds.
- Au⊂MOF-801(h) enabled, for the first time, size-selective nucleophilic addition of HCl to alkynes.
- The MOF-801(h) structure exhibited remarkable stability under harsh acidic and thermal conditions.
Conclusions:
- MOF-801(h) is a robust and versatile platform for creating advanced catalytic materials.
- The unique hollow structure facilitates efficient size-selective catalysis.
- This work overcomes synthetic challenges in producing stable SC hollow MOFs for demanding chemical transformations.
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