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Living Aqueous Microemulsion Polymerization of Ethylene with Robust Ni(II) Phosphinophenolato Catalysts

Living Aqueous Microemulsion Polymerization of Ethylene with Robust Ni(II) Phosphinophenolato Catalysts

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LIN, Fei, Tobias O. MORGEN, Stefan MECKING, 2021. Living Aqueous Microemulsion Polymerization of Ethylene with Robust Ni(II) Phosphinophenolato Catalysts. In: Journal of the American Chemical Society. American Chemical Society (ACS). 143(49), pp. 20605-20608. ISSN 0002-7863. eISSN 1520-5126. Available under: doi: 10.1021/jacs.1c10488

@article{Lin2021-12-15Livin-55985, title={Living Aqueous Microemulsion Polymerization of Ethylene with Robust Ni(II) Phosphinophenolato Catalysts}, year={2021}, doi={10.1021/jacs.1c10488}, number={49}, volume={143}, issn={0002-7863}, journal={Journal of the American Chemical Society}, pages={20605--20608}, author={Lin, Fei and Morgen, Tobias O. and Mecking, Stefan} }

Living Aqueous Microemulsion Polymerization of Ethylene with Robust Ni(II) Phosphinophenolato Catalysts Morgen, Tobias O. 2021-12-15 2021-12-22T10:26:55Z Lin, Fei 2021-12-22T10:26:55Z eng Due to chain transfer events being competitive with chain growth, ethylene polymerization by P,O-chelated Ni(II) complexes usually affords low molecular weight polymers or oligomers. We now show that appropriately bulky substituted phosphinophenolato Ni(II) can polymerize in a living fashion, virtually devoid of chain transfer. Aqueous polymerizations with microemulsions of [κ<sup>2</sup>-P,O-2-(2-(2',6'-(MeO)<sub>2</sub>C<sub>6</sub>H<sub>3</sub>)C6H4)(Ph)P-6-(3',5'-(CF<sub>3</sub>)<sub>2</sub>C<sub>6</sub>H<sub>3</sub>)C<sub>6</sub>H<sub>3</sub>O-NiMe(pyridine)] (3) at 30 °C yield polyethylenes with narrow molecular weight distributions (M<sub>w</sub>/M<sub>n</sub> 1.02 to 1.34) and ultrahigh molecular weights (up to 2 × 10<sup>6</sup>) in the form of aqueous nanoparticle dispersions. Catalyst stability and activity are maintained up to 70 °C in water. Lin, Fei terms-of-use Morgen, Tobias O. Mecking, Stefan Mecking, Stefan

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