期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 32, 页码 36159-36167出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c09544
关键词
ion-exchange; metal-organic frameworks; deacetalization-Knoevenagel condensation reaction; bifunctional catalysts
资金
- National Science Foundation of China [51472062]
- Postdoctoral Foundation of Heilongjiang Province [LBH-Z19059]
Metal-organic framework (MOF)-supported macroscale resin catalysts, IRA900(xOH)-MIL-101(Al)-NH2 (x means the concentration of NaOH), with spatially isolated antagonistic acid-base active sites were successfully synthesized through a novel strategy by ion exchange and in situ solvothermal methods. The hierarchical pore system of the as-prepared catalysts effectively promotes the mass transfer and contacts with catalytic active centers during the organic reactions. Therefore, the environmentally friendly catalysts exhibit excellent superior activity and stability in one-pot deacetalization-Knoevenagel condensation reaction, and the yield by optimal IRA900(0.2OH)-MIL-101(Al)-NH2 reaches close to 99% after 5 h at 110 degrees C. Thanks to the millimeter-sized resin carrier and robust sphere morphology, the recycling of the as-prepared catalysts only requires natural sedimentation. This work presents an effective strategy to build low-toxic acid-base catalysts by combining the advantages of ion-exchange resins and functionalized MOF materials.
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