Synthesis, Characterization of Zinc Complexes with Neutral α-Diimine Ligands and Application in Ring-opening Polymerization of ε-Caprolactone

Authors

  • Xiaodan Wang School of Pharmaceutical Chemistry and Chemical Engineering Guangdong Pharmaceutical University 13 Changmingshui Road, Wuguishan Town Zhongshan 528458, China. junhaotian62@sina.com
  • Xuehong Liu School of Pharmaceutical Chemistry and Chemical Engineering Guangdong Pharmaceutical University 13 Changmingshui Road, Wuguishan Town Zhongshan 528458, China
  • Ju Huang School of Pharmaceutical Chemistry and Chemical Engineering Guangdong Pharmaceutical University 13 Changmingshui Road, Wuguishan Town Zhongshan 528458, China

DOI:

https://doi.org/10.2533/chimia.2017.773

Keywords:

ε-caprolactone, Catalyst, Neutral ligands, Ring-opening polymerization, Zinc complex

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 ?-CL demonstrated the mechanism of monomer activation in the presence of benzyl alcohol.

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Published

2017-11-29

How to Cite

[1]
X. Wang, X. Liu, J. Huang, Chimia 2017, 71, 773, DOI: 10.2533/chimia.2017.773.