Formation of the intensively fluorescent mixed-ligand complex of Zr(OH)3+ with 3,5,7,2′,4′-pentahydroxyflavone in the presence of fluoride

•Interaction between Zr(IV) and 3,5,7,2′,4′ pentahydroxyflavone in the presence of fluoride has been investigated.•The formation of mixed-ligand complex Zr(OH)3(H4R)(F)− has been found.•The affinity constant of the mixed-ligand complex has been calculated.

The interaction between Zr(IV) and morin in the presence of fluoride has been found to be accompanied by the formation of the mixed-ligand complex Zr(OH)3(H4R)(F)−. The stability of the complex can be characterized by the concentration affinity constant lg Кα = 20.67 ± 0.04.

Graphical abstractThe novel intensively fluorescent mixed-ligand complex of Zr(IV) with 3,5,7,2′,4′-pentahydroxyflavone and fluoride has been obtained and characterized.Figure optionsDownload full-size imageDownload as PowerPoint slide