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- W2056510217 abstract "Abstract One‐pot, spontaneous, and in‐situ incorporation of Ru(II) complexes into a microgel (solubilized nanometer‐scale network) has been achieved in near quantitative efficiency by a polymer‐linking reaction of linear living poly(methyl methacrylate) (PMMA) with a bifunctional methacrylate (ethylene glycol dimethacrylate or bisphenol A dimethacrylate; linking agent) and a phosphine‐ligand monomer [diphenyl‐4‐styryl‐phosphine ( 3 ); i.e., CH 2 CHC 6 H 4 p ‐PPh 2 ] in the RuCl 2 (PPh 3 ) 3 ‐catalyzed living radical polymerization. The products were Ru‐bearing. PMMA‐armed star polymers with a microgel‐core that consisted of a copolymer network of the linking agent and 3 . Upon the network formation, the phosphine ligands efficiently encapsulated RuCl 2 (PPh 3 ) 3 , thus achieving a polymer catalyst directly from a polymerization catalyst. Colored dark brown‐red, the star polymers exhibited UV‐vis absorptions originating from the entrapped complex (3.1–7.4 × 10 −5 mol Ru/g of polymer), the incorporation efficiency being close to 100% with respect to the original polymerization‐catalyst. Detailed spectroscopic characterization showed the following: an absolute molecular weight of 1.7 × 10 5 to 1.7 × 10 6 , an arm number of 11–92 arms/polymer, and a radius of gyration of 8–19 nm (in DMF). Direct observation of the individual star molecules in solid state was achieved by transmission electron microscopy (unstained; 2–3 nm dark dots for the core) and atomic force microscopy (semi‐circular images). © 2006 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 44: 4966–4980, 2006" @default.
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- W2056510217 date "2006-07-21" @default.
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- W2056510217 title "Metal-complex-bearing star polymers by metal-catalyzed living radical polymerization: Synthesis and characterization of poly(methyl methacrylate) star polymers with Ru(II)-embedded microgel cores" @default.
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- W2056510217 doi "https://doi.org/10.1002/pola.21597" @default.
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