High and reversible SO2 capture by a chemically stable Cr(III)-based MOF

Partially fluorinated MIL-101(Cr) shows high SO2 capture (up to 18.4 mmol g(-1) at 298 K and up to 1 bar), chemical stability towards dry and humid SO2 and an outstanding cycling performance with facile regeneration. In situ DRIFT spectroscopy demonstrated the preferential adsorption sites within MIL-101(Cr)-4F(1%).