A coumarin-containing Schiff base fluorescent probe with AIE effect for the copper(<scp>ii</scp>) ion

Abstract

A novel coumarin-derived Cu²⁺-selective Schiff base fluorescent "turn-off" chemosensor CTPE was successfully obtained, which showed an AIE effect. It could identify Cu²⁺ by quenching its fluorescence. The lower limit of detection was 0.36 μM. CTPE can act as a highly selective and sensitive fluorescence probe for detecting Cu²⁺.