Porous Aromatic Framework Nanosheets Anchored with Lewis Pairs for Efficient and Recyclable Heterogeneous Catalysis
| Autor: | Xiaoqin Zou, Ye Yuan, Roland Faller, Guangshan Zhu, Haoyan Sha, Yihan Huang, Dan Deng, Qinghao Meng, Yajie Yang |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Steric effects
Materials science nanosheets General Chemical Engineering Imine General Physics and Astronomy Medicine (miscellaneous) chemistry.chemical_element 02 engineering and technology 010402 general chemistry Heterogeneous catalysis 01 natural sciences Biochemistry Genetics and Molecular Biology (miscellaneous) Catalysis chemistry.chemical_compound porous aromatic frameworks General Materials Science Lewis acids and bases Boron lcsh:Science Olefin fiber Full Paper General Engineering Lewis pairs Full Papers 021001 nanoscience & nanotechnology Combinatorial chemistry 0104 chemical sciences porous organic frameworks heterogeneous catalysis chemistry Density functional theory lcsh:Q 0210 nano-technology |
| Zdroj: | Advanced Science, Vol 7, Iss 22, Pp n/a-n/a (2020) Advanced Science Advanced science (Weinheim, Baden-Wurttemberg, Germany), vol 7, iss 22 |
| ISSN: | 2198-3844 |
| Popis: | Lewis pairs (LPs) with outstanding performance for nonmetal‐mediated catalysis reactions have high fundamental interest and remarkable application prospects. However, their solubility characteristics lead to instability and deactivation upon recycling. Here, the layered porous aromatic framework (PAF‐6), featuring two kinds of Lewis base sites (NPiperazine and NTriazine), is exfoliated into few‐layer nanosheets to form the LP entity with the Lewis acid. After comparison with various porous networks and verification by density functional theory (DFT) calculations, the NTriazine atom in the specific spatial environment is determined to preferably coordinate with the electron‐deficient boron compound in a sterically hindered pattern. LP‐bare porous product displays high catalytic activity for the hydrogenation of both olefin and imine compounds, and demonstrates ≈100% activity after 10 successful cycles in hydrogenation reactions. Considering the natural advantage of porous organic frameworks to construct LP groups opens up novel prospects for preparing other nonmetallic heterogeneous catalysts for efficient and recyclable catalysis. A porous aromatic framework featuring two kinds of Lewis base sites (NPiperazine and NTriazine) is exfoliated into few‐layer nanosheets to form a Lewis pair (LP) group with the Lewis acid in situ. This LP‐bare porous product with the significant catalysis performance opens up prospects for preparing other nonmetallic heterogeneous catalysts. |
| Databáze: | OpenAIRE |
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