End-Functionalized Palladium SCS Pincer Polymers via Controlled Radical Polymerizations

A direct and facile route toward semitelechelic polymers, end-functionalized with palladated sulfur–carbon–sulfur pincer (Pd^II-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 Pd^II-pincer chain-transfer agent for three classes of monomers: styrene, tert-butyl acrylate, and N-isopropylacrylamide. The ensuing Pd^II-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 Pd^II-pincer functionalized polymers with complete end-group functionalization.

A direct route toward polymers end-functionalized with palladated sulfur–carbon–sulfur pincer (Pd^II-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 Pd^II-pincer polymers with complete end-group functionalization.

from #MedicinebyAlexandrosSfakianakis via xlomafota13 on Inoreader http://ift.tt/2r99KOl
via IFTTT