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

Article abstract of DOI:10.1016/j.apcata.2019.117384

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.

Full text of DOI:10.1016/j.apcata.2019.117384

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Triazole based cobalt catalyst for CO2 insertion into epoxide at ambient
pressure
Suleman Suleman (Conceptualization) (Methodology)
(Investigation)<ce:contributor-role>Writing-original draft
preparation), Hussein A. Younus
(Investigation)<ce:contributor-role>Writing- original draft), Nazir
Ahmad (Investigation)<ce:contributor-role>Writing-original draft),
Zafar A.K. Khattak
(Investigation)<ce:contributor-role>Writing-original draft), Habib
Ullah, Jihae Park, Taejun Han (Supervision), Baoyi Yu, Francis
Verpoort (Conceptualization) (Methodology)
(Supervision)<ce:contributor-role>Writing-reviewing and editing)
PII:
S0926-860X(19)30539-3
DOI:
https://doi.org/10.1016/j.apcata.2019.117384
APCATA 117384
Reference:
To appear in:
Applied Catalysis A, General
Received Date:
Revised Date:
Accepted Date:
12 July 2019
20 December 2019
23 December 2019
Please cite this article as: Suleman S, Younus HA, Ahmad N, Khattak ZAK, Ullah H, Park J,
Han T, Yu B, Verpoort F, Triazole based cobalt catalyst for CO2 insertion into epoxide at
ambient pressure, Applied Catalysis A, General (2019),
doi: https://doi.org/10.1016/j.apcata.2019.117384

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Triazole based cobalt catalyst for CO2 insertion
into epoxide at ambient pressure
Suleman Suleman,ab Hussein A. Younus,*e Nazir Ahmad,f Zafar A. K. Khattak,ab Habib Ullah,ab
Jihae Park,c Taejun Han,c Baoyi Yu,*g and Francis Verpoort*abcd
[a]
Laboratory of Organometallics, Catalysis and Ordered Materials, State Key Laboratory of
Advanced technology for Materials Synthesis and Processing, Wuhan University of Technology,
Wuhan, 430070, PR China
[b]
School of Materials Science and Engineering, Wuhan University of Technology, Wuhan,
430070, PR China.
[c]
Ghent University, Global Campus Songdo, 119 Songdomunhwa-Ro, Yeonsu-Gu, ncheon
406-840, South Korea.
[d]
National Research Tomsk Polytechnic University, Lenin Avenue 30, Tomsk, 634050,
Russian Federation.
[e]
[f]
[g]
Chemistry Department, Faculty of Science, Fayoum University, Fayoum, 63514, Egypt.
Department of Chemistry, GC University, Lahore, 54000, Pakistan.
Key Laboratory of Urban Agriculture (North China), Ministry of Agriculture, College of
Biological Sciences Engineering, Beijing University of Agriculture, Beijing, 102206, PR China.
*Corresponding authors: Tel: +86 15071172245; Fax: +86 2787879468. E-mails:
francis.verpoort@ghent.ac.kr.

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Graphical Abstract
Highlights
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Cyclic carbonates are produced using a triazole based Co-complex at ambient pressure.
The catalyst is highly active under solvent free condition with TONs up to 85 × 103.
The catalyst is used with the variety of substrate exhibiting good to excellent conversions.
The catalyst is stable for at least five cycles with no significant loss in activity.
Abstract
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,