An efficient CO2 fixation reaction with epoxides catalysed by in situ formed blue vanadium catalyst from dioxovanadium(+5) complex: moisture enhanced and atmospheric oxygen retarded catalytic activity

Two new dioxovanadium(+5) complexes, one anionic and other neutral, have been synthesized and characterized by X-ray crystallography in this work. While doing cycloaddition reaction of CO2 to epoxides, taking dioxovanadium(+5) complex as the catalyst, a blue vanadium complex was generated in situ, w...

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Bibliographic Details
Published in:New journal of chemistry 2020-02, Vol.44 (6), p.2547-2554
Main Authors: Borah, Rakhimoni, Deori, Naranarayan, Brahma, Sanfaori
Format: Article
Language:English
Subjects:
Carbon dioxide
Catalysts
Catalytic activity
Crystallography
Cycloaddition
Fixation
Flue gas
Moisture
Oxygen
Tetrabutylammonium bromide
Vanadium
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Summary:Two new dioxovanadium(+5) complexes, one anionic and other neutral, have been synthesized and characterized by X-ray crystallography in this work. While doing cycloaddition reaction of CO2 to epoxides, taking dioxovanadium(+5) complex as the catalyst, a blue vanadium complex was generated in situ, which was found to be the active catalyst, showing excellent catalytic activity in the presence of tetrabutylammonium bromide as the co-catalyst. The catalytic activity of the catalyst system is enhanced by moisture and, on the other hand, is retarded by atmospheric oxygen. The enhanced catalytic activity at moistened conditions shows the applicability of the catalyst for CO2 fixation from wet flue gas. However, the retarded catalytic activity caused by atmospheric oxygen is important from the mechanistic point of view.
ISSN:1144-0546
1369-9261
DOI:10.1039/c9nj04606b