López‐Cervantes, V.B., Alhashimi, H., Celaya, C.A. et al. (11 more authors) (2025) Fluorescent Sensing of SO2 by MFM-300(M) Metal–Organic Frameworks: Influence of Semi-Open Metal Centres. Small. e07448. ISSN: 1613-6810
Abstract
The MFM-300(M) series (M = Al(III), Sc(III), Cr(III), and In(III)) have previously demonstrated excellent sulfur dioxide (SO2) adsorption capabilities, however, their potential as fluorescent SO2 sensors remains unexplored. Here, this work presents a comparative study of their fluorescence response upon SO2 exposure, with a particular focus on the role of the metal centers. MFM-300(Al) exhibits the strongest emission and highest quenching upon SO2 exposure, attributed to localized interactions with µ2-OH functional groups and aromatic sites. In contrast, Sc(III) and In(III) analogues show moderate quenching via charge transfer at the semi-open metal sites, while Cr(III) remains weakly emissive. Density Functional Theory (DFT) calculations employing periodic boundary conditions are conducted to characterize the electronic structure of MFM-300(M), to elucidate the role of metal centers in SO2 retention and to assess the semiconducting nature of these metal- organic frameworks (MOFs).
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2025 The Author(s). This is an open access article under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited. |
Keywords: | fluorescent sensing, metal-organic frameworks, MFM-300, sulfur dioxide |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemistry (Leeds) |
Date Deposited: | 02 Oct 2025 15:04 |
Last Modified: | 02 Oct 2025 15:04 |
Status: | Published online |
Publisher: | Wiley |
Identification Number: | 10.1002/smll.202507448 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:232437 |