ONO pincer type ligand complexes of Al(III) as efficient catalyst for chemical fixation of CO2 to epoxides at atmospheric pressure

Habib Ullah, Bibimaryam Mousavi, Hussein A. Younus, Zafar A.K. Khattak, Suleman Suleman, Muhammad T. Jan, Baoyi Yu, Somboon Chaemchuen, Francis Verpoort

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


Carbon dioxide, the main cause of environmental pollution, its utilization to produce valuable products is of utmost interest. A series ONO pincer hydrazone based most active mono-nuclear Al(III) complexes were successfully synthesized and characterized with the help of NMR, IR, mass spectrometry and only complex 2a was confirmed by single-crystal analysis. The synthesized Al(III) complexes were then employed as capable catalysts for the solvent-free chemical fixation of CO2 with epoxides at atmospheric pressure and could be reused five times without loss of any catalytic activity. In addition, the catalytic mechanism was investigated by analyzing intermediates via 1H NMR, 13C NMR, and mass MALDI-TOF. The excellent catalytic performance could be due to simultaneous attack and the opening of the epoxide by metal centers to form an alkoxide ion which activates the CO2 the same time.

Original languageEnglish
Pages (from-to)190-198
Number of pages9
JournalJournal of Catalysis
Publication statusPublished - 1 Sep 2019


  • Aluminium complexes
  • CO fixation
  • Cyclic carbonate
  • Homogeneous catalysis
  • Pincer ligand

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

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