Many solid adsorbents have been prepared for the CO

2

capture. In particular

the photoresponsive adsorbents have attracted extensive interests because of their tunable pore structure and variable responsive behaviors provoked by the external light. However

it is challenging to fabricate the photoresponsive adsorbents featured the big CO

2

capacity and high CO

2

selectivity. Herein

copolymerized between 4-phenylazobenzoyl chloride

2

4

6-trichloro-1

3

5-triazine and melamine

a series of azobenzene-functionalized porous polymers (PTM-AZOs) are successfully synthesized. The PTM-AZOs are verified in possession of proper pore structures

large surface area and photoconductive properties through a series of characterization. The PTM-AZO-2 with the

trans

-isomerization exhibits the best CO

2

adsorption amount of 2.7 mmol·g

-1

(273 K and 0.1 MPa)

while the CO

2

/N

2

selectivity can reach 2459 and 607 on the

trans

- and

cis

-isomerization

respectively. The regulatable pore structures controlled by the photoresponsive azobenzene groups affect the CO

2

capture performance of the PTM-AZOs.