A selective detection of nanomolar-range noxious anions in water by a luminescent metal–organic framework

Abstract

A Tb-doped Y-based MOF was constructed for simultaneous recognition of noxious anions HAsO42−, PO43−, MnO4−, CrO42− and Cr2O72− in water.

Ratiometric fluorescence sensing based on rare-earth upconversion nanoparticles for the rapid identification of antioxidant capacity

“…The overlap of the emission peaks of UCNPs@SiO 2 and the absorption band of SA-Fe III will trigger the internal filtration effect (IFE). [25][26][27] This effect causes the quenching of the overlapping parts and the peaks of the other parts are less affected. Therefore, the ratio between the change and stability peaks can be used for the detection of antioxidants.…”

A multi-responsive luminescent sensor based on a stable Eu(iii) metal–organic framework for sensing Fe3+, MnO4−, and Cr2O72−in aqueous solutions

“…35 Therefore, it is urgent to detect Fe 3+ , MnO 4 − and Cr 2 O 7 2− with high sensitivity and selectivity. [36][37][38][39][40] According to the data, some MOFs are used as sensors to detect the above ions. [41][42][43] Although a great progress has been achieved, most of the detection process is limited to non-aqueous solutions, thereby restricting their practical applications.…”

Selective Luminescence Turn-On-Based Sensing of Phosphate in the Presence of Other Interfering Anions Using a Heterobimetallic (3d–4d) MOF with an Acidic Pocket

“…Luminescence-based detections have drawn attention due to their quick response time, high perceptivity, and ease of operation along with portability. − Various kinds of materials such as organic dyes, quantum dots, metal nanoclusters, conjugated polymers, and supramolecules are reported for the detection of this anion. − However, these materials suffer from some disadvantages like poor water solubility, toxicity, laborious synthesis, and poor stability. Consequently, metal–organic frameworks, consisting of inorganic metal or metal oxide nodes and organic polydentate bridging ligands with excellent porosity, large surface area, high thermal stability, and diverse structures, are extensively applied in many areas such as smart sensing, hydrogen storage and separation, drug delivery, nonlinear optics, magnetism, proton conductivity, supercapacitor, catalysis, and energy storage. − The luminescence properties of MOFs have been extensively used for the sensing experiment of various types of analytes, as the luminescence properties are very much dependent on their physical features and interaction with analytes via the hydrogen bond, coordinate bond, pi–pi interaction, electron transfer, and energy transfer. − Due to different coordination environments, variable oxidation states, formal charges of metal ions, and different binding sites of ligands, MOFs are very useful for the purpose of discernment even at the atomic extent. − …”