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 synthesised and X-ray crystallographically characterised here in this work. While doing cycloaddition reaction of CO2 to epoxides taking dioxovanadium(+5) complex as catalyst, a blue vanadium complex was generated in situ which is found to be the active catalyst, showing excellent catalytic activity in presence of tetrabutyl ammonium bromide as co-catalyst. The catalytic activity of the catalyst system is enhanced by moisture, on the other hand, retarded by atmospheric oxygen. The enhanced catalytic activity at moistened condition shows the applicability of the catalyst for the CO2 fixation from wet flue gas. However, retarded catalytic activity caused by atmospheric oxygen is important from the mechanistic point of view.