A partial ligand exchange strategy for fabricating catalytically active single palladium site immobilized on zeolitic imidazolate framework-8(ZIF-8,Pd1/ZIF-8)is proposed in this work.The one-step synthesis simply invo...A partial ligand exchange strategy for fabricating catalytically active single palladium site immobilized on zeolitic imidazolate framework-8(ZIF-8,Pd1/ZIF-8)is proposed in this work.The one-step synthesis simply involves reacting Na_(2)PdCl_(4) with ZIF-8 in solvent.The Cl ligands of Na_(2)PdCl_(4) exchanged with 2-methylimidazole(2-MeIm)of the framework,resulting in the anchoring Pd on the framework and dissociation of Zn into the solution.The whole synthesis is performed at ambient conditions and the crystalline integrity of ZIF-8 is well retained.The resulting Pd_(1)/ZIF-8 is extensively characterized by different techniques which confirm the proposed mechanism.Pd_(1)/ZIF-8 is also successfully applied in the size-selective semi-hydrogenation of alkynes.展开更多
基金the National Natural Science Foundation of China(Nos.21972080,21503123,91961201,and 21871167)and Shanxi“1331 Project”for financial support.
文摘A partial ligand exchange strategy for fabricating catalytically active single palladium site immobilized on zeolitic imidazolate framework-8(ZIF-8,Pd1/ZIF-8)is proposed in this work.The one-step synthesis simply involves reacting Na_(2)PdCl_(4) with ZIF-8 in solvent.The Cl ligands of Na_(2)PdCl_(4) exchanged with 2-methylimidazole(2-MeIm)of the framework,resulting in the anchoring Pd on the framework and dissociation of Zn into the solution.The whole synthesis is performed at ambient conditions and the crystalline integrity of ZIF-8 is well retained.The resulting Pd_(1)/ZIF-8 is extensively characterized by different techniques which confirm the proposed mechanism.Pd_(1)/ZIF-8 is also successfully applied in the size-selective semi-hydrogenation of alkynes.
