摘要

A novel fluorescent chemosensor for F- and malonic acid derived from bridged calix[6]arene which possesses 2-aminopyridine as an ionophore and a fluorophore was synthesized. When a F- ion was bound to H atom linked to the amide, the ligand exhibited a marked quenched excimer emission due to photoinduced electron transfer effect. By the addition of malonic acid into the coordination compound, the excimer emission band was revived, by which an interesting on/off switch process was proposed.