期刊
GREEN CHEMISTRY
卷 23, 期 4, 页码 1766-1771出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0gc04425c
关键词
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资金
- National Natural Science Foundation of China [21601103, 21701097]
- Natural Science Foundation of Shandong Province, China [ZR2020QB035]
A new strategy has been developed to construct a bifunctional catalyst for CO2 cycloaddition by post-synthetically modifying CUS-based metal-organic frameworks (MOFs) with ionic porous organic frameworks (POFs) to form MOF@iPOF core-shell hybrid materials. The newly synthesized Cu-3(BTC)(2)@iPOF-TB-Br- and Cu-3(BTC)(2)@iPOF-TM-Br- exhibit excellent catalytic performance for CO2 cycloaddition under mild conditions and maintain the porosity of hybrid materials for improving mass transfer rate and catalytic efficiency.
A new strategy toward constructing a bifunctional catalyst for CO2 cycloaddition has been developed based on post-synthetic modification of CUS-based metal-organic frameworks (MOFs) with ionic porous organic frameworks (POFs) to form MOF@iPOF core-shell hybrid materials. Based on this strategy, two new MOF@iPOF core-shell hybrid materials, Cu-3(BTC)(2)@iPOF-TB-Br- and Cu-3(BTC)(2)@iPOF-TM-Br-, are synthesized for the first time by feasible encapsulation of a Cu-3(BTC)(2) core within an ionic POF shell. Because of the synergetic role of dual functional sites including CUS as a Lewis acid in the MOFs and the Br- anion as the nucleophile in the ionic POFs, Cu-3(BTC)(2)@iPOF-TB-Br- and Cu-3(BTC)(2)@iPOF-TM-Br- demonstrate excellent catalytic performance for the CO2 cycloaddition under co-catalyst free mild conditions (60 degrees C, 0.5 MPa CO2, 24 h). Moreover, these core-shell bifunctional catalysts can not only realize the synergy of two functional sites, but also maintain the porosity of hybrid materials for improving the mass transfer rate and catalytic efficiency.
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