• Breher, Frank
• Roesky, Peter
• Nagel, Christiane
• Kiefer, Claude
• Lejeune, Elise

Abstract

Polystyrene based copolymers with palladium-ligating side groups were obtained by RAFT polymerization of chloromethyl styrene and styrene, subsequent azide transformation and quantitative copper-mediated 1,3-dipolar cycloaddition of ethynyl pyridine. Variable copolymer compositions were synthesized ranging from 10% to 50% with respect to the fraction of the palladium-ligating comonomer. The successful loading of the polymers with PdCl<small><sub>2</sub></small> employing [Pd(COD)Cl<small><sub>2</sub></small>] (COD = 1,5-cyclooctadiene) as the metal source was confirmed by nuclear magnetic resonance spectroscopy (NMR) and elemental analysis. Absolute molecular weights of the Pd-containing polymers ranging from <em>M</em><small><sub>w</sub></small> = 16<img border="0" src="http://www.rsc.org/images/entities/char_2009.gif" alt=" " />000 g mol<small><sup>−1</sup></small> to 20<img border="0" src="http://www.rsc.org/images/entities/char_2009.gif" alt=" " />000 g mol<small><sup>−1</sup></small> were determined by employing static light scattering (SLS). In order to fully clarify the incorporation of palladium into the polymers, a PdCl<small><sub>2</sub></small> complex of a chelating <em>N</em> donor ligand featuring the characteristic heterocyclic donor functions used to incorporate PdCl<small><sub>2</sub></small> in the polymer was synthesized and characterized by single crystal X-ray diffraction and NMR analysis.

Topics

• single crystal X-ray diffraction
• single crystal
• copper
• molecular weight
• copolymer
• Nuclear Magnetic Resonance spectroscopy
• elemental analysis
• palladium
• static light scattering