Recent advances of fluorescence MOF-based sensors for the freshness of aquatic products

Aquatic products gradually occupy a place in human food because of their rich nutritional value. Followed by it, it is the food safety problem brought by aquatic products. Nevertheless, the traditional methods used to determine freshness have drawbacks including intricate sample preparation procedures, intricate and time-consuming processes, reliance on costly and cumbersome equipment, requirement for skilled personnel, and inadequate selectivity and sensitivity. Consequently, these methods are unable to achieve highly sensitive, selective, and on-site detection, thereby restricting their practical use. Metal-organic frameworks (MOFs) are a captivating category of extremely porous materials consisting of metal ions/clusters and organic linkers. These materials have significant promise in various domains. MOFs have been intensively studied as fluorescence sensors because of their distinct crystallinity, adjustable porosity, and structural variety. This review aims to showcase latest works in the field of active research and enhance the database of fluorescent MOF-based sensors. These sensors are designed to detect various freshness indicators such as biogenic amines, H2S, and ATP breakdown byproducts.