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Abstract:
The design and synthesis of metal-organic frameworks (MOFs) enclosed with multiple catalytic active sites is favorable for cooperative catalysis, but is is still challenging. Herein, we developed a sequential postsynthetic ionization and metalation strategy to prepare bifunctional multivariate Zr-MOFs incorporating zinc porphyrin and imidazolium functionalities. Using this facile strategy, tetratopic [5,10,15,20-tetrakis(4-carboxyphenyl)porphyrinato]zinc(II) (ZnTCPP) ligands were successfully installed into the cationic Zr-MOF to obtain ZnTCPP(Br-)Etim-UiO-66. These MTV-MOFs, including TCPPIm-UiO-66, TCPP(Br-)Etim-UiO-66, and ZnTCPP(Br-)Etim-UiO-66, were well characterized and used in CO2 capture and conversion into cyclic carbonate from allyl glycidyl ether and CO2 under cocatalyst-free and 1 bar CO2 pressure conditions. It was found that the structural features and CO2 affinity properties of these MTV-MOFs can be tuned by introducing imidazolium groups or doping zinc sites. Additionally, ZnTCPP(Br-)Etim-UiO-66 exhibited enhanced catalytic activities compared to other MTV-MOFs herein for obtaining the 3-allyloxy-1,2-proplyene carbonate product, which was attributed to the cooperative effect of Zn2+ sites and Br- ions in this microporous ionic MTV-MOF. ZnTCPP(Br-)Etim-UiO-66 can be recycled easily and used at least three times. © 2018 American Chemical Society.
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Inorganic Chemistry
ISSN: 0020-1669
Year: 2018
Issue: 5
Volume: 57
Page: 2584-2593
4 . 8 5
JCR@2018
4 . 3 0 0
JCR@2023
ESI HC Threshold:209
JCR Journal Grade:1
CAS Journal Grade:1
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 0
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