Abstract
We report highly chemically and thermally stable chlorine-functionalized
CAA-COF-1
and
CAA-COF-2
. The chlorine-functionalized COFs exhibited enhanced CO
2
uptake (by ∼28–44%) in comparison with their pristine COF analogues (
TpPa-1
and
TpBd
). Column breakthrough experiments reveal that
CAA-COF-1
and
CAA-COF-2
display a high CO
2
/N
2
(10/90) gas mixture selectivity of 95 and 54, respectively. Additionally,
CAA-COF-1
exhibits a CO
2
/CH
4
(10/90) column breakthrough selectivity of 29.