Tuning Pd-nanoparticle@MIL-101(Cr) catalysts for tandem reductive amination

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Abstract

The versatility of MOFs as highly porous Lewis acidic supports for precious metal nanoparticles has been exploited for one-pot tandem reductive amination catalysis. MIL-101(Cr) loaded with Pd nanoparticles ca. 3 nm in size at 0.2–1 wt% has been used to catalyse the reaction of 4′-fluoroacetophenone with benzylamine under 10 bar of H2 to give the secondary amine, 4′-fluoro-α-methyl-N-phenylmethylbenzenemethanamine. For the highest Pd loading, major hydrogenolysis of the secondary amine occurs in a second tandem reaction, but by changing the ratio of Pd to Lewis acidic Cr3+ active sites it is possible to tune the catalytic selectivity to the desired 2° amine product. An empirical kinetic analysis was performed to demonstrate this active site complementarity.
Original languageEnglish
JournalCatalysis Letters
VolumeIn press
DOIs
Publication statusPublished - 27 Nov 2017

Keywords

  • Pd@MIL-101
  • Tandem reductive amination
  • Kinetic modelling

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