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Updated: Apr 15, 2026

Controlled Photoredox Ring-Opening Polymerization of O-Carboxyanhydrides Mediated by Ni/Zn Complexes
Published on: November 21, 2017
Zinc complexes containing coumarin-derived anilido-aldimine ligands as catalysts for ring opening polymerization of
Chi-Tien Chen1, Min-Chian Wang2, Tzu-Lun Huang3
1Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan. ctchen@dragon.nchu.edu.tw.
Abstract:
The coumarin-derived ligand precursors L(1)H-L(6)H have been prepared. Treatment of these ligand precursors with 1.2 equiv. of ZnEt2 in toluene affords zinc ethyl complexes (LZnEt) 1-6 (where L = coumarin-derived ligands bearing different functional groups). Reaction of ligand precursor L(3)H with 1.5 equiv. of Zn[N(SiMe3)2]2 in toluene affords the zinc amide complex, L(3)ZnN(SiMe3)2, 7. All these compounds were characterized by NMR spectroscopy and elemental analysis. The molecular structures are reported for 1 and 7. The catalytic activities of complexes 1-7 towards the ring opening polymerization of l-lactide in the presence of 9-AnOH have been investigated.
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