Abstract
A novel covalent-triazine framework (CTF-PO71) is designed and prepared from an organic pigment molecule for high-performance gas separation. The functional sites with different electrostatic potentials on the pore surface of CTF-PO71 demonstrate a strong interaction between C
H
and CTF-PO71 to achieve preferential adsorption of C
H
over C
H
, thus enabling effective capture of a trace amount of C
H
from the gas mixture. This is the first organic porous polymer that is capable of separating C
H
and C
H
. The commercial availability and the low cost of the pigment as well as the high stability of the resultant framework endow CTF-PO71 with a significant potential for practical applications.