Controlled copolymerization by metal complexes [3]: Copolymerization of carbon dioxide and epoxide with zinc complex of N-substituted porphyrin

Hitomi Yamazaki, Hiroshi Sugimoto

Research output: Contribution to conferencePaper


We have investigated the copolymerization of carbon dioxide and epoxide. In this paper, we wish to report that zinc N-methylated tetraphenylporphyrin catalyzed the alternating copolymerization of carbon dioxide and cyclohexene oxide. Cyclohexene oxide (2.5 g, 25 mmol) and a THF solution (2.5 mL) of zinc N-methylated tetraphenylporphyrin (0.1 mmol) were heated (80°C/78 h) under 50 atm of carbon dioxide with stirring in a autoclave. The infrared spectrum of the reaction mixture showed two strong characteristic absorptions due to a linear carbonate linkage at 1750 and 1280 cm-1. From the 1H-NMR spectrum, the resultant polycarbonate was turned out to be highly alternated with 97% carbonate linkage. The determination of number-average molecular weight of this copolymer was estimated by the GPC chromatography (Mn = 15000, Mw/Mn = 2.5).

Original languageEnglish
Number of pages1
Publication statusPublished - 1 Dec 2005
Event54th SPSJ Annual Meeting 2005 - Yokohama, Japan
Duration: 25 May 200527 May 2005


Conference54th SPSJ Annual Meeting 2005



  • Carbon Dioxide
  • Copolymerization
  • Epoxide
  • Polycarbonate
  • Zinc-Porphyrin

Cite this