Fluorimetric Detection of Zn2+, Mg2+, and Fe2+ with 3-Hydroxy-4-Pyridylisoquinoline as Fluorescent Probe

The suitability of 3-hydroxy-4-pyridylisoquinoline to operate as fluorescent chemosensor for the detection of metal ions was investigated. For that purpose, the interactions of the title compound with selected metal ions were investigated by absorption and emission spectroscopy. The complexation of Zn2+, Fe2+, Mg2+ with 1:1 and 2:1 stoichiometry leads to characteristic optical responses that depend significantly on the employed solvents, thus allowing for the fluorimetric identification and detection of particular metal cations in a matrix-based pattern analysis or by fluorimetric titrations.

Automated summary

The study investigated the suitability of 3-hydroxy-4-pyridylisoquinoline as a fluorescent chemosensor for detecting metal ions. Interactions with selected metal ions were studied using absorption and emission spectroscopy, revealing characteristic optical responses for Zn2+, Fe2+, and Mg2+ complexes with 1:1 and 2:1 stoichiometry, allowing for the identification and detection of specific metal cations under different solvent conditions.