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Updated: Feb 18, 2026

Controlled Photoredox Ring-Opening Polymerization of O-Carboxyanhydrides Mediated by Ni/Zn Complexes
Published on: November 21, 2017
Synthesis, Characterization of Zinc Complexes with Neutral α-Diimine Ligands and Application in Ring-opening
Xiaodan Wang1, Xuehong Liu2, Ju Huang2
1School of Pharmaceutical Chemistry and Chemical Engineering Guangdong Pharmaceutical University 13 Changmingshui Road, Wuguishan Town Zhongshan 528458, China;,
Abstract:
A series of neutral α-diimine ligands with diacetyl and acenaphthenequinone skeletons were prepared by the reaction between diacetyl and the corresponding aromatic amine. These ligands reacted with ZnCl2 to generate symmetric α-diimine zinc complexes C1-C10. Experimental results indicated that the α-diimine zinc complexes with a diacetyl skeleton (C1-C4) were active in ring-opening polymerization (ROP) of ε-caprolactone (ε-CL). The complexes with an acenaphthenequinone skeleton showed a small steric effect (C5, C8 and C9) but the complex substituted with an electron-withdrawing group (C10) showed high activity in the monomer conversion rate during ROP of ε-CL. The ROP catalysts of ε-CL demonstrated the mechanism of monomer activation in the presence of benzyl alcohol.
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