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Nanocomposites of Phosphonic-Acid-Functionalized Polyethylenes with Inorganic Quantum Dots

Nanocomposites of Phosphonic-Acid-Functionalized Polyethylenes with Inorganic Quantum Dots

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RÜNZI, Thomas, Moritz C. BAIER, Carla NEGELE, Marina KRUMOVA, Stefan MECKING, 2015. Nanocomposites of Phosphonic-Acid-Functionalized Polyethylenes with Inorganic Quantum Dots. In: Macromolecular Rapid Communications. 36(2), pp. 165-173. ISSN 0173-2803. eISSN 1521-3927

@article{Runzi2015Nanoc-29373, title={Nanocomposites of Phosphonic-Acid-Functionalized Polyethylenes with Inorganic Quantum Dots}, year={2015}, doi={10.1002/marc.201400441}, number={2}, volume={36}, issn={0173-2803}, journal={Macromolecular Rapid Communications}, pages={165--173}, author={Rünzi, Thomas and Baier, Moritz C. and Negele, Carla and Krumova, Marina and Mecking, Stefan} }

Krumova, Marina Baier, Moritz C. 2015 2014-12-02T10:04:38Z Negele, Carla Mecking, Stefan Rünzi, Thomas Nanocomposites of Phosphonic-Acid-Functionalized Polyethylenes with Inorganic Quantum Dots Negele, Carla Rünzi, Thomas Krumova, Marina 2014-12-02T10:04:38Z Baier, Moritz C. Mecking, Stefan eng Insertion of diethyl vinyl phosphonates and free vinyl phosphonic acid, respectively, into [(P^O)Pd(Me)(dmso)] ((P^O) =κ<sup>2</sup>-P,O-Ar<sub>2</sub>PC<sub>6</sub>H<sub>4</sub>SO<sub>2</sub>O with Ar = 2-MeOC<sub>6</sub>H<sub>4</sub>) (1-dmso) occurs in a 2,1- as well as 1,2-fashion, to form a four-and a five-membered chelate [(P^O)Pd{κ<sup>2</sup>-C,O-CH(P(O)(OR)<sub>2</sub>)CH<sub>2</sub>CH<sub>3</sub>}] and [(P^O)Pd{κ<sup>2</sup>-C,O-CH<sub>2</sub>CH(P(O)(OR)<sub>2</sub>)CH<sub>3</sub>}] (R = H, Et). No decomposition or other reactions of 1 by free phosphonic acid moieties occur. Copolymerization in a pressure reactor by 1-dmso yields linear random poly(ethylene-co-diethyl vinyl phosphonate) and poly(ethylene-co-vinyl phosphonic acid). In these copolymerizations, reversible coordination of the phosphonate moieties of free monomer as well as chelate formation by incorporated monomer retards chain growth as also evidenced by relative binding studies of diethyl phosphonate towards 1. Post-polymerization emulsification of poly(ethylene-co-vinyl phosphonic acid) together with CdSe/CdS quantum dots (QDs) yields submicron (ca. 50 nm from dynamic light scattering (DLS) and transmission electron microscopy (TEM)) polymer particles with the QDs embedded in the functionalized polyethylene in a nonaggregated fashion. This embedding benefits the fluorescence behavior in terms of continuous emission and life-time as revealed by wide-field fluorescence measurements. These composite particle dispersions are employed as a ″masterbatch” together with an aqueous high density polyethylene (HDPE) dispersion to generate thin films (by spin-coating) and bulk materials (from the melt), respectively, in which the inorganic nanoparticles remain highly disperse.

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