Antimonene Quantum Dots as an Emerging Fluorescent Nanoprobe for the pH‐Mediated Dual‐Channel Detection of Tetracyclines

Abstract

Antimonene quantum dots (AMQDs) are attracting considerable attention due to their fascinating physicochemical properties. However, research on their semiconductor characteristics, especially the photoluminescence performance, is still in a preliminary stage and the experimental verification is scarcely reported, significantly restricting their further applications. Herein, the photoluminescence property of AMQDs is experimentally verified. The AMQDs are prepared by probe sonication‐assisted liquid‐phase exfoliation and show robust blue fluorescence, and the photoluminescence is hardly affected by pH. In view of the derivatization reaction of tetracyclines (TET) at different pHs, AMQDs are developed as a pH‐mediated dual‐channel ratiometric fluorescent probe for TET detection. Under acidic conditions, the AMQDs’ probe exhibits unique recognition behavior due to the inherent fluorescence of TET and the solvent‐enhancing effect, that is, the fluorescence changes from blue to red. Under alkaline conditions, this fluorescent probe realizes the transition from blue to yellow‐green because of the decomposition of TET. The limits of detection are 27 × 10−9 and 74 × 10−9 m, respectively. The high sensitivity and remarkable fluorescence changes make AMQDs ideal probes for TET sensing. Additionally, this is the first report on the photoluminescence property of AMQDs. It is believed that this work will open a new avenue for AMQDs in optical sensing fields.

Fluorescence and Colorimetric Dual-Mode Ratiometric Sensor Based on Zr–Tetraphenylporphyrin Tetrasulfonic Acid Hydrate Metal–Organic Frameworks for Visual Detection of Copper Ions

“…On the one hand, the possible mechanism of the ratiometric FL detection for Cu 2+ was discussed. First, as displayed in Figure A, there was no overlap between the absorption spectrum of Cu 2+ and the FL excitation or emission spectrum, indicating the FL quenching may not be caused by the IFE. − Moreover, the FL decay curves of ZTMs in the absence and presence of Cu 2+ are shown in Figure B. In addition, the FL lifetimes of ZTMs before and after adding various Cu 2+ concentrations were 4.15, 4.45, 4.34, and 4.33 ns, respectively.…”

Emerging metallenes: synthesis strategies, biological effects and biomedical applications

“…They emitted blue fluorescence without environmental interference under excitation at 350 nm, and can be used as a pH-mediated dual-channel ratiometric fluorescent probe for tetracycline detection. 60 In addition, some metallenes exhibit fluorescence quenching and therefore may be useful as nucleic acid (DNA, miRNA, etc. ) biosensors.…”

“…5b). 60 Compared to simple probe ultrasound, this synthesis method can generate a uniform and ultrasmall 2D material. Bismuth, phosphorus, antimony, and arsenic elements in group VA have both metallic and nonmetallic properties.…”

Converting the Competitive Coordination Effect in a Nanoporous Europium–Organic Framework into a Luminescent Indicator Displacement Assay for Turn-On and Visual Detection of Antibiotic Tetracycline

“…Luminescent sensors exhibiting fast response, high sensitivity, simple operation, and in situ and real-time detection abilities have been regarded as attractive complements of instrumentation analysis for routine TC detection. To date, a variety of luminescent materials have been explored for TC sensing, such as Eu-functional composites, – carbon dots, , metal nanoparticles, , polymers, , AIE molecules, , and so on. , …”