A metal–organic cage with light-switchable motifs for controllable CO2 adsorption

Literature Information

Publication Date 2023-11-27
DOI 10.1039/D3TA06149C
Impact Factor 12.732
Authors

Yao Jiang, Tao Yang, Xiao-Qin Liu, Peng Cui, Lin-Bing Sun


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Abstract

Light-switchable composites have great potential to enable processes that can be controlled on demand, which is difficult to achieve with conventional materials that have stationary structures and properties. Here, we present a light-switchable metal–organic cage, NUT-102, structurally incorporated with pendant azobenzene groups for controllable CO2 capture. Upon visible light irradiation, the trans isomerization of the azobenzene groups exposes the pores of NUT-102 and favors CO2 adsorption. Conversely, upon ultraviolet light irradiation, the azobenzene groups undergo a conformation transformation from trans to cis isomerization, resulting in the sheltering of the pores and subsequently reducing CO2 adsorption. Significantly, the light-switchable modulated CO2 adsorption change amount can reach up to 65.2%. Moreover, density functional theory calculations further confirmed the controllable CO2 adsorption behavior in NUT-102. The present study provides new insights into the development of novel light-switchable adsorbents tailored for controllable CO2 adsorption.

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Journal of Materials Chemistry A

Journal of Materials Chemistry A
CiteScore: 19.5
Self-citation Rate: 4.7%
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