Fluorescence Detection of Trace Disinfection Byproducts by Ag Nanoprism-Modulated Lanthanide MOFs

Abstract

Disinfection byproducts (DBPs), as an emerging water pollutant, present increasing concern and risk in public health and water safety. Due to their low concentration levels and inherent similarity in molecular structures, sensitive and accurate determination of DBPs is still a challenge especially for onsite or online detection. Herein, a self-regulated fluorescent probe based on the Ag nanoprism-modified lanthanide metal− organic framework (AgNPR@EuMOF) is designed for trichloroacetic acid (TCAA) detection. The EuMOF is constructed with Eu as the metal node and 5-boronoisophthalic acid as the ligand. By introducing sulfhydryl groups into EuMOF, AgNPR can be anchored on the EuMOF surface through Ag−S bonds, enabling the synthesis of stable AgNPR@EuMOF composites. During the sensing process, the triangle AgNPR will react with the organic halogen molecule, accomplished with the blue shift of surface plasmon resonance absorption peak and the significant change in the fluorescence of EuMOF. This probe can detect TCAA in a wide concentration range (0.1−40 μM) with high sensitivity and specificity. The density functional theory calculation on binding energies between DBPs and AgNPR suggests that TCAA has the largest interaction ability with AgNPR than other DBPs. Moreover, the detection of TCAA in real tap water and swimming pool water is also demonstrated with high accuracy. The reported AgNPR@EuMOF represents one of the pioneer fluorescence probes in DBP detection, which holds great promise for onsite or online analysis of trace DBPs in water.

Macrophage-Inspired Degradation-Activation System Enables Ultrasensitive Multicolor Detection of Haloacetic Acids via Janus Perovskite Halide Exchange

“…Recently, Mao et al reported the first monochrome fluorescence sensor for trichloroacetic acid detection. 9 However, due to the singularity of its output color and the diversity of HAAs, it is urgent to develop a more universal multicolor fluorimetry method.…”

“…Of all available approaches, fluorimetry, for its facile operability, high sensitivity, and rapid response, may be an ideal candidate method for the HAA assay. Recently, Mao et al reported the first monochrome fluorescence sensor for trichloroacetic acid detection . However, due to the singularity of its output color and the diversity of HAAs, it is urgent to develop a more universal multicolor fluorimetry method.…”

Peroxidase mimics of platinum-group metals for in vitro diagnostics: opportunities and challenges

“…For instance, PGM nanostructures are more catalytically active than most other types of peroxidase mimics. 21,22 PGM nanostructures have exceptional resistance to oxidation and high temperatures, which contributes to their outstanding chemical and thermal stabilities. They can be conveniently functionalized with bioreceptors through noncovalent and/or covalent methods.…”

Highly Efficient Dual-Color Luminophores for Sensitive and Selective Detection of Diclazepam Based on MOF/COF Bi-Mesoporous Composites

“…Wang and his team designed a dual-emitting Ln-MOF fluorescent sensor for discriminative analysis of structurally similar antibiotics . Fang et al utilized the unique luminescent properties of the EuMOF sensor for TCAA detection . In addition to having the advantages of general MOF materials, − conductive metal–organic frameworks (C-MOFs) have attracted great attention benefitting from their high conductivity. − Yang and his team prepared a conductive bimetallic MOF (NiCo-HHTP) to improve ECL performance by increasing conductivity, opening a new chapter for designing highly conductive MOF-based ECL materials .…”