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 Al3+ based on internal charge transfer. The coumarin bipyridyl chemosensor exhibited a high association constant with submicromolar detection for the aluminum ion.