Nitrogen-rich porous organic polymers have shown great potentials in gas adsorption/separation

photocatalysis

electrochemistry

sensing and so on. Herein

1

2

3-triazole functionalized triazine-based porous organic polymers (TT-POPs) have been synthesized by the copper-catalyzed azide-alkyne cycloaddition (Cu-AAC) polymerization reactions of 1

3

5-tris(4-azidophenyl)-triazine with 1

4-diacetylene benzene and 1

3

5-triacetylenebenzene

respectively. The characterizations of N

2

adsorption at 77 K show TT-POPs possess permanent porosity with BET surface areas of 666 m

2

·g

-1

(TT-POP-1) and 406 m

2

·g

-1

(TT-POP-2). The adsorption capacities of TT-POPs for CO

2

CH

4

C

2

H

2

and C

2

H

4

as well as the selective separation abilities of CO

2

/N

2

CO

2

/CH

4

C

2

H

2

/CH

4

and C

2

H

4

/CH

4

were evaluated. The gas selective separation ratio of TT-POPs was calculated by the ideal adsorbed solution theory (IAST) method

wherein the selective separation ratios of C

2

H

2

/CH

4

and C

2

H

4

/CH

4

of TT-POP-2 was 48.4 and 13.6 (298 K

0.1 MPa)

which is comparable to other adsorbents (5.6-120.6 for C

2

H

2

/CH

4

10-26 for C

2

H

4

/CH

4

). This work shows that the 1

2

3-triazole functionalized triazine-based porous organic polymer has a good application prospect in natural gas purification.