UTSA-16(Zn) for SO2 detection: elucidating the fluorescence mechanism

López-Cervantes, Valeria B.; Martínez, Marco L.; Obeso, Juan L.; García-Carvajal, Celene; Portillo-Vélez, Nora S.; Guzmán-Vargas, Ariel; Peralta, Ricardo A.; González-Zamora, Eduardo; Ibarra, Ilich A.; Solis-Ibarra, Diego; Woodliffe, John Luke; Amador-Sánchez, Yoarhy A.

Abstract

In this study, the potential of the metal–organic framework UTSA-16(Zn) as a fluorescence detector for SO2 is explored. The material was synthesized and characterized by powder X-ray diffraction (PXRD), infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA), and its fluorescence behavior was analyzed before and after SO2 exposure. A significant decrease in fluorescence intensity was observed and a LOD of 1.79 mM (∼114.6 ppm) was obtained. With the help of time-resolved photoluminescence (TRPL) experiments and X-ray photoelectron (XPS) and ultraviolet-visible (UV-vis) spectroscopy, a static quenching mechanism due to the formation of a non-fluorescent complex in the ground state (GSC) was elucidated

Citation

López-Cervantes, V. B., Martínez, M. L., Obeso, J. L., García-Carvajal, C., Portillo-Vélez, N. S., Guzmán-Vargas, A., Peralta, R. A., González-Zamora, E., Ibarra, I. A., Solis-Ibarra, D., Woodliffe, J. L., & Amador-Sánchez, Y. A. (in press). UTSA-16(Zn) for SO2 detection: elucidating the fluorescence mechanism. Dalton Transactions, 54, 1646-1654. https://doi.org/10.1039/d4dt02852j

• Journal Article Type: Article
• Acceptance Date: Nov 27, 2024
• Online Publication Date: Dec 4, 2024
• Deposit Date: Feb 25, 2025
• Publicly Available Date: Dec 5, 2025
• Journal: Dalton Transactions
• Print ISSN: 1477-9226
• Electronic ISSN: 1477-9234
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 54
• Pages: 1646-1654
• DOI: https://doi.org/10.1039/d4dt02852j
• Public URL: https://nottingham-repository.worktribe.com/output/42840974
• Publisher URL: https://pubs.rsc.org/en/content/articlelanding/2025/dt/d4dt02852j