Abstract
A generic catch-release catalysis system has been designed for the recovery of homogeneous catalysts at the end of a reaction using host-guest interactions. This proof-of-concept system consists of a palladium(ii)-dipyrazole complex bearing an adamantyl (Ad) molecular recognition moiety (guest), and magnetic nanoparticles (MNP) decorated with β-cyclodextrins (β-CD) (host). The density of β-CD on the iron oxide nanoparticles was up to 3.1 × 10-4 mmol per mg, sufficient to efficiently catch the Ad-adorned Pd catalyst in aqueous methanol at room temperature. Release and recycling of the catalyst was achieved by extraction with methanol. This catch-release system performed well in the Suzuki-Miyaura coupling, but suffers from slow degradation which restricts the number of times that the catalyst and magnetic nanoparticles can be recycled and reused.
Original language | English |
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Pages (from-to) | 23686-23692 |
Number of pages | 7 |
Journal | RSC Advances |
Volume | 6 |
Issue number | 28 |
DOIs | |
Publication status | Published - 2016 |
Externally published | Yes |