Macromolecular Rapid Communications
Macromolecular Rapid Communications
5 years ago

End-Functionalized Palladium SCS Pincer Polymers via Controlled Radical Polymerizations

End-Functionalized Palladium SCS Pincer Polymers via Controlled Radical Polymerizations
Diane S. Lye, Aaron E. Cohen, Marcus Weck, Madeleine Z. Wong
A direct and facile route toward semitelechelic polymers, end-functionalized with palladated sulfur–carbon–sulfur pincer (PdII-pincer) complexes is reported that avoids any post-polymerization step. Key to our methodology is the combination of reversible addition-fragmentation chain-transfer (RAFT) polymerization with functionalized chain-transfer agents. This strategy yields Pd end-group-functionalized materials with monomodal molar mass dispersities (Đ) of 1.18–1.44. The RAFT polymerization is investigated using a PdII-pincer chain-transfer agent for three classes of monomers: styrene, tert-butyl acrylate, and N-isopropylacrylamide. The ensuing PdII-pincer end-functionalized polymers are analyzed using 1H NMR spectroscopy, gel-permeation chromatography, and elemental analysis. The RAFT polymerization methodology provides a direct pathway for the fabrication of PdII-pincer functionalized polymers with complete end-group functionalization. A direct route toward polymers end-functionalized with palladated sulfur–carbon–sulfur pincer (PdII-pincer) complexes, avoiding postpolymerization steps, is reported. Combining reversible addition-fragmentation chain-transfer (RAFT) polymerization with functionalized chain-transfer agents, and styrene, tert-butyl acrylate, or N-isopropylacrylamide monomers, polymers of dispersities (Đ) 1.18–1.44 are obtained. This methodology provides a direct pathway for the fabrication of PdII-pincer polymers with complete end-group functionalization.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/marc.201700174

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