Synthesis of 5-Dialkyl(aryl)aminomethyl-8-hydroxyquinoline Dansylates as Selective Fluorescent Sensors for Fe3+

摘要

A series of 5-dialkyl(aryl)aminomethyl-8-hydroxyquinoline dansylates were synthesized and their fluoroionophoric properties toward representative alkali ions, alkaline earth ions and transition metal ions were investigated. Among the selected ions, Fe³⁺ caused considerable quenching of the fluorescence, while Cr³⁺ caused quenching to some extent. The absence of any significant fluorescence quenching effects of the other ions examined, especially Fe²⁺, renders these compounds highly useful Fe³⁺-selective fluorescent sensors.