Quinoline-ampyrone functionalized azo dyes as colorimetric and fluorescent enhancement probes for selective aluminium and cobalt ion detection in semi-aqueous media

Surface functionalization of recyclable polymer for application as a flexible fluorescent sensor

“…The literature reports several studies involving azo compounds as sensors for determining metals. However, the analyses are performed in different solvent mediums and not from a superficially functionalized polymeric film [75][76][77][78][79][80][81][82][83][84]. In addition, for the azo compound in question in this study, [4-(2-hydroxy naphthyl)diazenyl] benzoic acid, no studies were found involving its use as a sensor in the detection of cations.…”

Recent advances in the fluorimetric and colorimetric detection of cobalt ions

“…8j ). 60 Lin Wang and colleagues developed chemosensor 31 using oxadiazole as the starting emitting material, which worked as a detector for cobalt ions ( Fig. 8l ).…”

A facile synthesis of a novel 4-hydroxyl-3-azo coumarin based colorimetric probes for detecting Hg2+ and a fluorescence turn-off response of 3CBD to Fe3+ in aqueous environment

“…None of the tested metal ions were able to activate the intramolecular charge transfer process (ICT) to restore conjugation, which would trigger a "turn-on" response in the emission spectra through chelation-enhanced uorescence of the molecule. 68 3.2.1. Fluorescence titration of 3CBD with Fe 3+ .…”