Abstract
A nitro-decorated microporous covalent-organic framework (COF), TpPa-NO2, has been synthesized in gramscale with one-pot reaction. It can effectively selective separate C2H4 from C2H2/C2H4/CO2 mixture and capture CO2 from CO2/N2 based on IAST calculations and transient breakthrough experiments. Theoretical calculations demonstrated that the hydrogen atom of imine bonds, carbonyl oxygen and nitro groups show high affinity toward C2H2 and CO2 and play vital roles in efficient separation.