Developing technology that can precisely monitor specific air pollutants in diverse settings is essential to control emissions and ensure safe exposure limits are not exceeded. Metal-organic frameworks (MOFs) are crystalline organic-inorganic hybrid materials, which are promising candidates for SO detection. Their chemically mutable periodic structure confers outstanding surface area, thermal stability, and a well-defined pore distribution. Moreover, MOFs have exhibited extraordinary performance for SO capture. Therefore, research has focused on their possible applications for SO sequestration due to the selective and robust chemical and physical interactions of SO molecules within MOFs. The variable SO affinity presented by MOFs enables the adsorption mechanism and preferential adsorption sites to be resolved. However, for MOF-based SO detection, selective SO capture at shallow partial pressure (0.01-0.1 bar) is required. Thus, capturing SO at low concentration is crucial for SO detection, where textural properties of MOFs, mainly the pore-limiting diameter, are essential to achieve selective detection. In this review, we discuss the fundamental aspects of SO detection in MOFs, providing a step-by-step methodology for SO detection in MOFs. We hope this review can provide valuable background around SO detection in MOFs and inspire further research within this new and exciting field.
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