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 journalArticle

Abstract

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
Volume377
DOIs
Publication statusPublished - 1 Sep 2019

Fingerprint

epoxy compounds
Epoxy Compounds
Atmospheric pressure
atmospheric pressure
Ligands
Nuclear magnetic resonance
catalysts
nuclear magnetic resonance
ligands
Catalysts
Hydrazones
hydrazones
alkoxides
pollution
Carbon Dioxide
attack
Mass spectrometry
catalytic activity
carbon dioxide
Catalyst activity

Keywords

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

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

Cite this

ONO pincer type ligand complexes of Al(III) as efficient catalyst for chemical fixation of CO2 to epoxides at atmospheric pressure. / Ullah, Habib; Mousavi, Bibimaryam; Younus, Hussein A.; Khattak, Zafar A.K.; Suleman, Suleman; Jan, Muhammad T.; Yu, Baoyi; Chaemchuen, Somboon; Verpoort, Francis.

In: Journal of Catalysis, Vol. 377, 01.09.2019, p. 190-198.

Research output: Contribution to journalArticle

Ullah, Habib ; Mousavi, Bibimaryam ; Younus, Hussein A. ; Khattak, Zafar A.K. ; Suleman, Suleman ; Jan, Muhammad T. ; Yu, Baoyi ; Chaemchuen, Somboon ; Verpoort, Francis. / ONO pincer type ligand complexes of Al(III) as efficient catalyst for chemical fixation of CO2 to epoxides at atmospheric pressure. In: Journal of Catalysis. 2019 ; Vol. 377. pp. 190-198.
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AU - Khattak, Zafar A.K.

AU - Suleman, Suleman

AU - Jan, Muhammad T.

AU - Yu, Baoyi

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AB - 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.

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