Highly sensitive and selective fluorescent bis-thiosemicarbazone chemosensor for dual recognition of Zn²⁺ and pyrophosphate anions (P₂O₇^4-) with bioimaging applications

This study reports the synthesis and characterization of a series of three bis-thiosemicarbazone ligands and their zinc dinuclear complexes, with a focus on 4-tert-butyl-2,6-bis(N-4-allylthiosemicarbazonyl)phenol (H₃L3). This ligand exhibits remarkable photophysical properties and a high