TY - JOUR
T1 - Thermoresponsive and xenon-triggered gate-opening in flexible three-dimensional covalent organic framework for selective xenon capture
AU - Wang, Yongzheng
AU - Wang, Shanshan
AU - Li, Yinhui
AU - Liu, Shizhen
AU - Liang, Qingxin
AU - Chen, Bin
AU - Zhang, Wenxiang
AU - Ma, Heping
N1 - Publisher Copyright:
© The Author(s) 2026.
PY - 2026/12
Y1 - 2026/12
N2 - The development of dynamically responsive soft porous crystals (SPCs) is crucial for advanced gas separation due to their stimuli-triggered structural transitions. Herein, we report a 3D covalent organic framework (FCOF-XJ) constructed from flexible tetrahedral (F-3D-Td) and rigid tetrahedral (3D-Td) building blocks, exhibiting unique temperature-dependent selective adsorption of xenon (Xe). FCOF-XJ features thermoresponsive -O-C-C-C-O- single bonds that enable temperature-dependent conformational switching. The adaptive pore structure of FCOF-XJ enables an Xe-triggered gate-opening effect, with 4 times increase of Xe adsorption and a high Xe/Kr selectivity (36.9 at 298 K, 1 bar) among porous organic materials, surpassing most of metal-organic frameworks (MOFs). Breakthrough experiments reveal a defined high-purity Xe recovery window from Xe/Kr mixtures under non-ideal dynamic conditions, enabled by thermoresponsive pore-gating dynamics. This work establishes a flexible COF platform for thermoresponsive and Xe-selective capture based on guest-triggered framework gating.
AB - The development of dynamically responsive soft porous crystals (SPCs) is crucial for advanced gas separation due to their stimuli-triggered structural transitions. Herein, we report a 3D covalent organic framework (FCOF-XJ) constructed from flexible tetrahedral (F-3D-Td) and rigid tetrahedral (3D-Td) building blocks, exhibiting unique temperature-dependent selective adsorption of xenon (Xe). FCOF-XJ features thermoresponsive -O-C-C-C-O- single bonds that enable temperature-dependent conformational switching. The adaptive pore structure of FCOF-XJ enables an Xe-triggered gate-opening effect, with 4 times increase of Xe adsorption and a high Xe/Kr selectivity (36.9 at 298 K, 1 bar) among porous organic materials, surpassing most of metal-organic frameworks (MOFs). Breakthrough experiments reveal a defined high-purity Xe recovery window from Xe/Kr mixtures under non-ideal dynamic conditions, enabled by thermoresponsive pore-gating dynamics. This work establishes a flexible COF platform for thermoresponsive and Xe-selective capture based on guest-triggered framework gating.
UR - https://www.scopus.com/pages/publications/105047043377
U2 - 10.1038/s41467-026-75235-x
DO - 10.1038/s41467-026-75235-x
M3 - 文章
C2 - 42399272
AN - SCOPUS:105047043377
SN - 2041-1723
VL - 17
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 8295
ER -