Pd-complex driven formation of single-chain nanoparticles

Johannes Willenbacher, Ozcan Altintas, Vanessa Trouillet, Nicolai Knöfel, Michael J. Monteiro, Peter W. Roesky, Christopher Barner-Kowollik

Research output: Contribution to journalArticlepeer-review

69 Scopus citations

Abstract

We report the facile synthesis of well-defined palladium(ii) cross-linked single-chain nanoparticles (Pd-SCNPs) using the 'repeating unit approach'. The linear precursor polymer (Mn ≈ 10200 g mol-1, ≈ 1.17) was synthesized via nitroxide mediated statistical copolymerization of styrene and 4-(chloromethyl)styrene (CMS) followed by a post-polymerization modification of the resulting copolymer to covalently attach the triarylphosphine ligand moieties. The ligand content along the lateral polymer chain was 12%. Intramolecular crosslinking was performed in diluted solution with a suitable precursor complex (Pd[1,5-cyclooctadiene]Cl2) to afford the well-defined Pd-SCNPs, which feature a hydrodynamic diameter of Dh = 5.4 nm. The palladium(ii) containing single-chain nanoparticles were characterized in-depth using 1H NMR spectroscopy, 31P{1H} NMR spectroscopy, dynamic light scattering (DLS), size exclusion chromatography (SEC), 1H spin-spin relaxation time (T2) analysis, X-ray photoelectron spectroscopy (XPS), and log-normal distribution (LND) simulations. Finally, the applicability of the Pd-SCNPs as catalyst in the Sonogashira coupling was exemplified.

Original languageEnglish (US)
Pages (from-to)4358-4365
Number of pages8
JournalPolymer Chemistry
Volume6
Issue number24
DOIs
StatePublished - Jun 28 2015

Bibliographical note

Publisher Copyright:
© The Royal Society of Chemistry 2015.

Fingerprint Dive into the research topics of 'Pd-complex driven formation of single-chain nanoparticles'. Together they form a unique fingerprint.

Cite this