Synthesis of zinc complexes bearing pyridine derivatives and their application of ε-caprolactone and L-Lactide polymerization

Guan Jhen Chen, Shi Xian Zeng, Cheng Hsun Lee, Yu Lun Chang, Chun Juei Chang, Shangwu Ding, Hsuan Ying Chen, Kuo Hui Wu, I. Jy Chang

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2 Scopus citations

Abstract

A series of pyridine and polypyridine-zinc complexes were synthesized, and their application in ε-caprolactone and l-lactide polymerization was studied. In ε-caprolactone polymerization, zinc complexes bearing 1,10-phenanthroline derivatives exhibited a higher polymerization rate than did diethyl zinc (2–10 times). In l-lactide polymerization, zinc complexes bearing 1,10-phenanthroline derivatives exhibited a considerably higher polymerization rate than did diethyl zinc (2–220 times). According to density functional theory results, the ortho-hydrogens of polypyridine ligand can co-activate the carbonyl group of monomers with zinc metal center to increase the catalytic activity of zinc catalysts.

Original languageEnglish
Article number122374
JournalPolymer
Volume194
DOIs
StatePublished - 24 Apr 2020

Keywords

  • L-lactide
  • Pyridine
  • Ring-opening polymerization
  • Zinc complex
  • ε-Caprolactone

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