Self-Coupling Reactions of Terminal Alkynes Catalyzed by Nanorod-Like Metalloporphyrin Organic Frameworks Encapsulated with Copper Nanoparticles: Synergistic Catalytic Effects of Dual Copper Structures
Social Science Research Network(2022)
摘要
By encapsulating metal nanoparticles (NPs), the synergistic effect between the metalloporphyrins and the metal nanoparticles in metalloporphyrin organic frameworks (P-MOFs) can boost its catalytic performance. The selfcoupling reaction of terminal alkynes is a kind of important organic reaction and can take place with the aid of the catalyst. A nanorod-like metal-organic skeleton PCN-222(Cu) with carboxy porphyrins as ligands was synthesized as the precursor. By a double-solvent approach, the composite catalysts with varying copper nanoloadings in PCN-222(Cu) pores were obtained. Among them, 1.9 wt% of Cu NPs in Cu@PCN-222(Cu) has excellent catalytic activity and stability for the self-coupling reaction of terminal alkynes. PCN-222(Cu) can stabilize the Cu NPs, control the size selectivity and crystal form. The copper porphyrins and Cu NPs in Cu@PCN222(Cu) both serve as the catalytic active sites. This strategy, which using porphyrin-structured MOFs to construct dual active sites with the same element, has promising applications in MOFs catalysis.
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关键词
Metalloporphyrin organic framework,Copper nanoparticles,PCN-222,Self -coupling reaction,Catalysis
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