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- Title
Chemical Vapor Deposition of Pd(CH)(CH) to Synthesize Pd@MOF-5 Catalysts for Suzuki Coupling Reaction.
- Authors
Zhang, Mingming; Guan, Jingchao; Zhang, Bingsen; Su, Dangsheng; Williams, Christopher; Liang, Changhai
- Abstract
The highly porous metal organic framework MOF-5 was loaded with the metal-organic compound [Pd(CH)(CH)] by metal-organic chemical vapor deposition (MOCVD) method. The inclusion compound [Pd(CH)(CH)]@MOF-5 was characterized by powder X-ray diffraction (PXRD), Fourier-transform infrared (FT-IR) spectroscopy, and solid-state nuclear magnetic resonance spectroscopy. It was found that the host lattice of MOF-5 remained intact upon precursor insertion. The -CH ligand in the precursor is easier to lose due to the interaction between palladium and the benzenedicarboxylate linker in MOF-5, providing a possible explanation for the irreversibility of the precursor adsorption. Pd nanoparticles of about 2-5 nm in size was formed inside the cavities of MOF-5 by hydrogenolysis of the inclusion compound [Pd(CH)(CH)]@MOF-5 at room temperature. N sorption of the obtained material confirmed that high surface area was retained. In the Suzuki coupling reaction the Pd@MOF-5 materials showed a good activity in the first catalytic run. However, the crystal structure of MOF-5 was completely destroyed during the following reaction runs, as confirmed by PXRD, which caused a big loss of the activity. Graphical Abstract: The embedding of palladium nanoparticles into the metal organic framework MOF-5 has been successfully prepared by MOCVD method, and been used as catalyst for Suzuki reaction. The prepared Pd@MOF-5 had a very high BET surface area with Pd particles in size of 2-5 nm. The Pd@MOF-5 was used as a heterogeneous catalyst for the Suzuki coupling reaction and achieved a good activity.[InlineMediaObject not available: see fulltext.]
- Subjects
CHEMICAL vapor deposition; PALLADIUM; NANOPARTICLES; CATALYSTS; SUZUKI reaction; X-ray diffraction; NUCLEAR magnetic resonance; HYDROGENOLYSIS
- Publication
Catalysis Letters, 2012, Vol 142, Issue 3, p313
- ISSN
1011-372X
- Publication type
Article
- DOI
10.1007/s10562-012-0767-7