title: Lactide as the Playmaker of the ROP Game: Theoretical and Experimental Investigation of Ring-Opening Polymerization of Lactide Initiated by Aminonaphtholate Zinc Complexes.
abstract: A family of homo- and heteroleptic zinc complexes bearing aminonaphtholate ligands was synthesized and fully characterized. Using NMR spectroscopy and DFT calculation, bis-alkoxy-bridged complexes [LZn(μ-OR)]2were confirmed to have dimeric structures in solution, analogous to those obtained via X-ray crystallography. Surprisingly, a detailed experimental and theoretical study of the catalytic activity of [LZn(μ-OR)]2in the ring-opening polymerization (ROP) of lactides showed that although well-defined alkoxy dimers possess a single-site structural motif, the most active initiator is obtained during in situ alcoholysis of the alkylzinc precursor. These results indicate that rational ancillary and alkoxy ligand design that takes into account its mutual interaction on monomer coordination may be key to the synthesis of new high-performance ROP catalysts.
authors.affiliation: Faculty of Chemistry, University of Wroclaw , Fryderyka Joliot-Curie 14, 50-383 Wroclaw, Poland.
authors.forename: Dawid
authors.initials: D
authors.lastname: Jędrzkiewicz
authors.affiliation: Centre of Polymer and Carbon Materials Polish Academy of Science , Marii Curie-Skłodowskiej 34, 41-819 Zabrze, Poland.
authors.forename: Grażyna
authors.initials: G
authors.lastname: Adamus
authors.affiliation: Centre of Polymer and Carbon Materials Polish Academy of Science , Marii Curie-Skłodowskiej 34, 41-819 Zabrze, Poland.
authors.forename: Michał
authors.initials: M
authors.lastname: Kwiecień
authors.affiliation: Faculty of Chemistry, University of Wroclaw , Fryderyka Joliot-Curie 14, 50-383 Wroclaw, Poland.
authors.forename: Łukasz
authors.initials: Ł
authors.lastname: John
authors.affiliation: Faculty of Chemistry, University of Wroclaw , Fryderyka Joliot-Curie 14, 50-383 Wroclaw, Poland.
authors.forename: Jolanta
authors.identifier: http://orcid.org/0000-0002-7467-1312
authors.initials: J
authors.lastname: Ejfler