Recent Progress on Luminescent Metal-Organic Framework-Involved Hybrid Materials for Rapid Determination of Contaminants in Environment and Food

Abstract

The high speed of contaminants growth needs the burgeoning of new analytical techniques to keep up with the continuous demand for monitoring and legislation on food safety and environmental pollution control. Metal-organic frameworks (MOFs) are a kind of advanced crystal porous materials with controllable apertures, which are self-assembled by organic ligands and inorganic metal nodes. They have the merits of large specific surface areas, high porosity and the diversity of structures and functions. Latterly, the utilization of metal-organic frameworks has attracted much attention in environmental protection and the food industry. MOFs have exhibited great value as sensing materials for many targets. Among many sensing methods, fluorometric sensing is one of the widely studied methods in the detection of harmful substances in food and environmental samples. Fluorometric detection based on MOFs and its functional materials is currently one of the most key research subjects in the food and environmental fields. It has gradually become a hot research direction to construct the highly sensitive rapid sensors to detect harmful substances in the food matrix based on metal-organic frameworks. In this paper, we introduced the synthesis and detection application characteristics (absorption, fluorescence, etc.) of metal-organic frameworks. We summarized their applications in the MOFs-based fluorometric detection of harmful substances in food and water over the past few years. The harmful substances mainly include heavy metals, organic pollutants and other small molecules, etc. On this basis, the future development and possible application of the MOFs have prospected in this review paper.

Devising Mixed-Ligand Based Robust Cd(II)-Framework From Bi-Functional Ligand for Fast Responsive Luminescent Detection of Fe3+ and Cr(VI) Oxo-Anions in Water With High Selectivity and Recyclability

“…Severe pollution of earth’s hydrosphere by detrimental chemicals has raised global concerns to human health and ecological systems. ( Samanta et al, 2019 ; Yao et al, 2020 ) For instance, Fe 3+ ion is one of the vital ions existing in the living organism and plays essential role in transportation of oxygen molecule through blood. It also has a fundamental role in the formation of haemoglobin, enzyme and proteins.…”

“…On the other hand, luminescence-based sensory materials have shown several advantages, for instance, fast response time, ease of performance, distinct signal outputs, low cost, high sensitivity, and low detection limit. ( El Rassi, 1997 ; Zhu et al, 2013 ; Wang et al, 2015 ; Senthilkumar et al, 2018 ; Guo et al, 2019 ; Yao et al, 2020 ) Although, several homogenous sensors have been developed, ( Ma et al, 2019 ), quest of heterogeneous sensor is indispensable owing to their advantages like separation, eco-friendly nature and multicyclic regeneration properties. ( Liu et al, 2016 ; Vikrant et al, 2018 ; Zhao et al, 2018 ; Yan, 2019 ) In this milieu, metal-organic frameworks (MOFs) have grown as most fascinating porous, heterogonous scaffolds with well defined-crystalline materials, and recently used as probes for luminescent sensing of diverse lethal pollutants.…”

Metal-organic Framework-based Materials: Synthesis, Stability and Applications in Food Safety and Preservation

“…[211] Yao and co-authors summarized the rapid determination of contaminants in food by employing luminescent MOFs. [212] Recently, Wu et al developed a highly luminescent europium Eu-MOF, i.e., LMOF-241 emission spectra from the LMOF-241 at Aflatoxin B1 concentrations of 0 ppb (black), 46 ppb (red), 91 ppb (green), 134 ppb (orange), and 177 ppb (blue). [210] Adapted and reprinted with permission from reference of 210, copyright 2015 American Chemical Society.…”

Luminescent Properties of Lanthanoid-Poly(Sodium Acrylate) Composites: Insights on the Interaction Mechanism

“…Metal-organic materials have received great attention in recent years, because of the metal-ligand interaction, which can form three-dimensional structures, such as metal-organic frameworks (MOF) and metal-organic gels (MOG); these materials have already presented promising applications for supercapacitors, sensing, catalysis and optoelectronics [1][2][3][4][5]. MOG preparation is simpler, involving hydrogen bonding interactions, π-π stacking, van der Waals forces and coordination bonds under mild conditions to form self-assembled supramolecular structures [6,7].…”