Conformationally Constrained (Coumarin−Triazolyl−Bipyridyl) Click Fluoroionophore as a Selective Al3+ Sensor

A conformationally constrained (coumarin-pyrrolidinyl-triazolyl-bipyridyl) fluoroionophore conjugate was synthesized through click chemistry. The fluoroionophore serves as a selective chemosensor for Al(3+) based on internal charge transfer. The coumarin-bipyridyl chemosensor exhibited a high association constant with submicromolar detection for the aluminum ion.