This review discusses the advances in fluorescent Schiff base sensors for metal ion detection with a focus on the strategies, mechanistic insights, and applications.
A hydrazine-derived bis(2-hydroxybenzylidene)-[1,1′-biphenyl]-2,2′-dicarbohydrazide (sensor 1) can selectively recognize Al3+ and Zn2+ with significant fluorescence enhancement at 458 nm and 478 nm.
A new promising fluorescent chemosensor of Al3+ based on a 2-hydroxynaphthaldehyde skeleton was successfully synthesized through double imine formation and demonstrated excellent sensing properties through the ESIPT inhibition mechanism.
A frost-resistant hydrogel electrolyte with high ionic conductivity at −40 °C has been developed for wearable Zn//WO3−x electrochromic devices.
A quinoline-derived Schiff base probe (TQSB) was developed for the selective fluorogenic detection of Al3+ ions. TQSB was successfully applied for Al3+ imaging in real-life samples such as soil samples, gastric tablets, and MCF-7 cells.