Confined benzene within InOF-1: Contrasting CO₂ and SO₂ capture behaviours

The confinement of small amounts of benzene in InOF-1 (Bz@InOF-1) shows a contradictory behavior in the capture of CO₂ and SO₂. While the capture of CO₂ is increased 1.6 times, compared to the pristine material, the capture of SO₂ shows a considerable decrease. To elucidate these behaviors, the interactions of CO₂ and SO₂ with Bz@InOF-1 were studied by DFT periodical calculations postulating a plausible explanation: (a) in the case of benzene and CO₂, these molecules do not compete for the preferential adsorption sites within InOF-1, providing a cooperative CO₂ capture enhancement and (b) benzene and SO₂ strongly compete for these preferential adsorption sites inside the MOF material, reducing the total SO₂ capture.