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CYCU-3: an Al(iii)-based MOF for SO2 capture and detection

The Al(iii)-based MOF CYCU-3 exhibits a relevant SO2 adsorption performance with a total uptake of 11.03 mmol g−1 at 1 bar and 298 K. CYCU-3 displays high chemical stability towards dry and wet SO2 exposure. DRIFTS experiments and computational calculations demonstrated that hydrogen bonding between...

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Published in:Dalton transactions : an international journal of inorganic chemistry 2024-03, Vol.53 (10), p.4790-4796
Main Authors: Obeso, Juan L, López-Cervantes, Valeria B, Flores, Catalina V, Martínez, Ana, Amador-Sánchez, Yoarhy A, Portillo-Velez, N S, Lara-García, Hugo A, Leyva, Carolina, Solis-Ibarra, Diego, Peralta, Ricardo A
Format: Article
Language:English
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Summary:The Al(iii)-based MOF CYCU-3 exhibits a relevant SO2 adsorption performance with a total uptake of 11.03 mmol g−1 at 1 bar and 298 K. CYCU-3 displays high chemical stability towards dry and wet SO2 exposure. DRIFTS experiments and computational calculations demonstrated that hydrogen bonding between SO2 molecules and bridging Al(iii)–OH groups are the preferential adsorption sites. In addition, photoluminescence experiments demonstrated the relevance of CYCU-3 for application in SO2 detection with good selectivity for SO2 over CO2 and H2O. The change in fluorescence performance demonstrates a clear turn-on effect after SO2 interaction. Finally, the suppression of ligand–metal energy transfer along with the enhancement of ligand-centered π* → π electronic transition was proposed as a plausible fluorescence mechanism.
ISSN:1477-9226
1477-9234
DOI:10.1039/d3dt04073a