Metal-organic frameworks and their composites for the adsorption and sensing of phosphate

Moumen, Elmehdi; Bazzi, Loubna; Hankari, Samir El

doi:10.1016/j.ccr.2021.214376

Cited by 80 publications

(37 citation statements)

References 189 publications

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“…MOFs are a class of highly organized porous nanomaterials with a crystalline inorganic-organic hybrid structure, assembled from multiple coordination of organic linkers and inorganic metal ions as cluster nodes ( Figure 2 ) [ 45 , 46 ]. The inorganic components of MOFs, known as secondary building units (SBUs), may contain a variety of alkaline earth metals, alkali metals, transition metals, actinides, lanthanides, and several main groups of metal ions that are primarily in carboxylate form to coordinate with a variety of organic ligands (bipyridyl, imidazolate, and carboxylate-based) and biological macromolecules (amino acids, peptides, nucleobase, and saccharide) [ 47 ]. Organic linkers act as bridging ligands between metal nodes, with di-, tri-, and tetra-carboxylate ligands (e.g., Terephthalic acid, 2-aminoterephthalic acid, benzene tricarboxylic acid (BTC) and trimesic acid) being commonly used due to their sterically rigid and highly polarized aromatic structures, allowing for complex morphologies as well as more rigid frameworks [ 48 , 49 ].…”

Section: Metal-organic Framework (Mofs)mentioning

confidence: 99%

Metal-Organic Frameworks Applications in Synergistic Cancer Photo-Immunotherapy

et al. 2023

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Conventional cancer therapies, such as radiotherapy and chemotherapy, can have long-term side effects. Phototherapy has significant potential as a non-invasive alternative treatment with excellent selectivity. Nevertheless, its applicability is restricted by the availability of effective photosensitizers and photothermal agents, and its low efficacy when it comes to avoiding metastasis and tumor recurrence. Immunotherapy can promote systemic antitumoral immune responses, acting against metastasis and recurrence; however, it lacks the selectivity displayed by phototherapy, sometimes leading to adverse immune events. The use of metal-organic frameworks (MOFs) in the biomedical field has grown significantly in recent years. Due to their distinct properties, including their porous structure, large surface area, and inherent photo-responsive properties, MOFs can be particularly useful in the fields of cancer phototherapy and immunotherapy. MOF nanoplatforms have successfully demonstrated their ability to address several drawbacks associated with cancer phototherapy and immunotherapy, enabling an effective and low-side-effect combinatorial synergistical treatment for cancer. In the coming years, new advancements in MOFs, particularly regarding the development of highly stable multi-function MOF nanocomposites, may revolutionize the field of oncology.

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Section: Metal-organic Framework (Mofs)mentioning

confidence: 99%

Metal-Organic Frameworks Applications in Synergistic Cancer Photo-Immunotherapy

et al. 2023

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“…Uniform internal pores in MOFs constrain the passing through of reactants to improve the reaction selectivity. Particularly, the metal nodes of MOFs serving either as potential catalytic sites or anchoring sites for functional molecules could play crucial roles in catalysis [ 4 , 5 ]. Despite the tremendous effort devoted to developing various MOF-based catalysts, conceiving the sophisticated methods to build up MOF/organocatalyst co-catalytic systems with desirable stability, selectivity and solvent tolerance is far away from realistic [ 6 , 7 , 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Catalytic Activity of TEMPO-Mediated Aerobic Oxidation of Alcohols via Redox-Active Metal–Organic Framework Nodes

et al. 2023

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Metal–organic frameworks (MOFs) are outstanding platforms for heterogeneous catalysis due to their tunable pore size, huge surface area, large porosity, and potential active sites. The design and synthesis of MOF/organocatalyst co-catalytic systems have attracted considerable interest owing to their high catalytic activity, low toxicity, and mild reaction conditions. Herein, we reported the synthesis of a bifunctional TEMPO-IsoNTA organocatalyst featuring a pyridyl group as an anchoring site and a TEMPO radical as a catalytic active site. By using the topologically isomorphic structures of MIL-101(Fe) and MIL-101(Cr) as co-catalysts, these MOF/TEMPO-IsoNTA systems enable the efficient aerobic oxidation of various alcohols to their corresponding aldehydes or ketones under mild conditions. Notably, the MIL-101(Fe)/TEMPO-IsoNTA system exhibits superior catalytic activity, thanks to their redox-active FeIII-oxo nodes, which facilitate the regeneration of TEMPO-IsoNTA. Our research not only solves the problem of potential heavy metal contamination in the TEMPO-based homogeneous catalytic system, but also enriches the understanding of synergism of MOFs/organocatalysts.

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“…In recent years, several fluorescence sensing platforms based on metal–organic frameworks (MOFs) have been developed and widely used for the detection of phosphates. ,, Among them, Zr–porphyrin MOFs synthesized from tetra(4-carboxyphenyl)porphyrin (H 6 TCPP) have attracted much attention for their excellent stability and unique luminescence properties. , Due to the strong affinity between Zr 4+ ions and phosphates, zirconium nodes and porphyrin ligands can act as recognition active sites and signal reporter groups for phosphates, respectively, in Zr-TCPP-MOFs, enabling quantitative detection by fluorescence. Inspired by the excellent PEC activity of porphyrins and the high specific surface area and outstanding aqueous stability of Zr-MOFs, Zr-TCPP-MOF materials are expected to achieve better photoelectrochemical sensing applications in aqueous media …”

Section: Introductionmentioning

confidence: 99%

Enhanced Ultrasensitive Photoelectrochemical Probe for Phosphate Detection in Water Based on a Zirconium–Porphyrin Framework

Han

Zhang

Lü

et al. 2022

ACS Appl. Mater. Interfaces

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Excessive phosphate poses a serious ecological and human health risk, and thereby, monitoring its trace concentration is of great significance to environmental protection and human health. In this work, a zirconium−porphyrin framework (PCN-222) with excellent stability and unique luminescence properties was designed to modify the surface of the indium tin oxide electrode, which was first used as a photoelectrochemical (PEC) probe for phosphate detection. The PCN-222-modified PEC probe demonstrated an excellent selectivity and stability and indicated a linear response to phosphate in the range of 0−10 6 nM with a limit of detection (LOD) as low as 1.964 nM. To the best of our knowledge, this is the phosphate probe with the lowest LOD, and this is also the first signal-on PEC probe toward phosphate based on PCN-222. More importantly, the PEC probe can be validated for the good applicability of trace phosphate detection in real water samples, indicating a good application prospect. Finally, a series of electrochemical and spectroscopic studies have proved that phosphate can bind to the indium tin oxide (ITO)/PCN-222 electrode, which shortens the distance of the space charge region while reducing the bandwidth and thus facilitates the transfer of photogenerated electrons across the energy band barrier to reduce O 2 in the electrolyte, producing an enhanced cathodic photocurrent signal. The proposed strategy of the highly sensitive PEC probe provides a promising platform for more effective label-free phosphate monitoring in the environment and organisms.

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Metal-organic frameworks and their composites for the adsorption and sensing of phosphate

Cited by 80 publications

References 189 publications

Metal-Organic Frameworks Applications in Synergistic Cancer Photo-Immunotherapy

Metal-Organic Frameworks Applications in Synergistic Cancer Photo-Immunotherapy

Enhanced Catalytic Activity of TEMPO-Mediated Aerobic Oxidation of Alcohols via Redox-Active Metal–Organic Framework Nodes

Enhanced Ultrasensitive Photoelectrochemical Probe for Phosphate Detection in Water Based on a Zirconium–Porphyrin Framework

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