Synthesis of novel fluorescent sensor based on a modified amino Al‐MOF for rapid, sensitive, and selective detection of arsenic in aqueous solution

Abstract

In this study, a novel fluorescent sensor was created on the basis of the Schiff base reaction, where the covalent attachment was achieved by condensation of NH 2 -Al-MOF and 2-hydroxyacetophenone ligand. The condensation was verified by Fourier transform infrared (FT-IR), X-ray diffraction spectrometry (XRD), Brunauer-Emmett-Teller (BET), in addition to (XPS) analysis. Studied fluorescence characteristics in optimum conditions and the results were great, especially the low limit of detection (LOD) and the limit of quantification (LOQ). By examining the impact of some interfering ions, the selectivity of the 2HA = N-MIL-53(Al) sensor was determined. The novel sensor was used to measure the presence of As 3+ ions in a real water sample. All the data that were examined suggested that the 2HA = N-MIL-53(Al) sensor offered excellent detection efficiency while being selective, sensitive, quick, direct, and effective in sensing and detecting As 3+ ions in an aqueous solution.

A Label-Free Electrochemical Biosensor for Homocysteine Detection Using Molecularly Imprinted Polymer and Nanocomposite-Modified Electrodes

“…However, some methods have LODs that are significantly lower than this Hcy-MIP biosensor method—for instance, the quantum dot platform method with an LOD and detection range in the nM range [ 15 , 32 , 33 ] or HPLC with a post-column reaction platform, where the LOD and detection range are 10 times better [ 5 , 8 , 9 ]. It is possible to modify the Hcy-MIP to obtain a fluorescent signal [ 45 ] and apply it to the fluorescent sensor platform to obtain a better LOD [ 49 ]. During the polymerization process, the Hcy-MIP can be coated on a polymeric photonic platform for the real-time sensing of Hcy [ 50 ].…”