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Divergent [{ONNN}Mg–Cl] complexes in highly active and living lactide polymerization

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Abstract

Chloro-magnesium complexes of divergent tetradentate-monoanionic {ONNN}-type ligands which formed as either mononuclear or dinuclear complexes are reported. These complexes catalyze the ring-opening polymerization of lactide with high activity and in a living manner, and enable the synthesis of well-defined stereo-diblock copolymers with Mn > 200 kDa, as well as stereo-n-block copolymers (n = tri, tetra) with high molecular weights by sequential monomer addition. Thermal and crystallographic characterizations revealed that even the very high molecular weight PLA copolymers crystallized in a stereocomplex phase, and that their degradation temperature was as high as 354 °C.

Graphical abstract: Divergent [{ONNN}Mg–Cl] complexes in highly active and living lactide polymerization

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Publication details

The article was received on 05 Apr 2017, accepted on 25 May 2017 and first published on 26 May 2017


Article type: Edge Article
DOI: 10.1039/C7SC01514C
Citation: Chem. Sci., 2017, Advance Article
  • Open access: Creative Commons BY-NC license
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    Divergent [{ONNN}Mg–Cl] complexes in highly active and living lactide polymerization

    T. Rosen, I. Goldberg, W. Navarra, V. Venditto and M. Kol, Chem. Sci., 2017, Advance Article , DOI: 10.1039/C7SC01514C

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