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Platinum(II)‐Crosslinked Single‐Chain Nanoparticles: An Approach towards Recyclable Homogeneous Catalysts
Author(s) -
Knöfel Nicolai D.,
Rothfuss Hannah,
Willenbacher Johannes,
BarnerKowollik Christopher,
Roesky Peter W.
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201700718
Subject(s) - copolymer , catalysis , hydroamination , styrene , polymer chemistry , amination , platinum , polymerization , homogeneous , intramolecular force , homogeneous catalysis , materials science , chemistry , polymer , chemical engineering , organic chemistry , physics , thermodynamics , engineering
We introduce the synthesis and in‐depth characterization of platinum(II)‐crosslinked single‐chain nanoparticles (Pt II ‐SCNPs) to demonstrate their application as a recyclable homogeneous catalyst. Specifically, a linear precursor copolymer of styrene and 4‐(diphenylphosphino)styrene was synthesized via nitroxide‐mediated polymerization. The triarylphosphine ligand moieties along the backbone allowed for the intramolecular crosslinking of single chains via the addition of [Pt(1,5‐cyclooctadiene)Cl 2 ] in dilute solution. The successful formation of well‐defined Pt II ‐SCNPs was evidenced by size exclusion chromatography, dynamic light scattering, nuclear magnetic resonance ( 1 H, 31 P{ 1 H}, 195 Pt), and diffusion‐ordered spectroscopy. Finally, the activity of the Pt II ‐SCNPs as homogeneous, yet recyclable catalyst was successfully demonstrated using the example of the amination of allyl alcohol.