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 |
|---|---|
| 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 |
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A catch-release catalysis system based on supramolecular host-guest interactions. / Qi, Miao; Chew, Benny Kia Jia; Yee, Kwai Ga; Zhang, Zhong Xing; Young, David J.; Hor, T. S.Andy.
In: RSC Advances, Vol. 6, No. 28, 2016, p. 23686-23692.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - A catch-release catalysis system based on supramolecular host-guest interactions
AU - Qi, Miao
AU - Chew, Benny Kia Jia
AU - Yee, Kwai Ga
AU - Zhang, Zhong Xing
AU - Young, David J.
AU - Hor, T. S.Andy
PY - 2016
Y1 - 2016
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84960145552&partnerID=8YFLogxK
U2 - 10.1039/c6ra01846g
DO - 10.1039/c6ra01846g
M3 - Article
VL - 6
SP - 23686
EP - 23692
JO - RSC Advances: an international journal to further the chemical sciences
JF - RSC Advances: an international journal to further the chemical sciences
SN - 2046-2069
IS - 28
ER -