Triazole based cobalt catalyst for CO2 insertion into epoxide at ambient pressure

Suleman Suleman, Hussein A. Younus, Nazir Ahmad, Zafar A.K. Khattak, Habib Ullah, Jihae Park, Taejun Han, Baoyi Yu, Francis Verpoort

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Over the past decades, a lot of efforts have been made for the fixation of carbon dioxide (CO2) into epoxide for the synthesis of industrially important cyclic carbonates. Here, a cobalt(II) complex based on triazole, namely Co(II)-1,2,3-1H-triazole-4-carboxylate, was synthesized, fully characterized by FTIR, NMR, mass spectrometry, and single crystal X-ray diffraction, and used as a catalyst for the cycloaddition of CO2 to epoxides. The catalytic studies demonstrated that the catalyst is highly active for the CO2 fixation, with high turnover number (TON, 85 × 103) even without the use of solvent and at ambient pressure (1 bar) to produce a variety of different cyclic carbonates depending on the epoxide. Remarkably, the catalyst was used continuously further by the addition of a fresh amount of the substrate within the same reaction mixture for at least five successive reaction cycles without any loss in the catalytic activity.

Original languageEnglish
Article number117384
JournalApplied Catalysis A: General
Publication statusPublished - 5 Feb 2020


  • Carbon dioxide
  • Cyclic carbonates
  • Cycloaddition
  • Epoxide
  • Homogeneous catalysis

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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