Highly selective fluorescent chemosensor for Fe3 + detection based on diaza-18-crown-6 ether appended with dual coumarins

A new fluorescent chemosensor based on diaza-18-crown-6 ether, which was appended with dual coumarins, exhibited high selectivity and anti-disturbance for Fe3 + among environmentally and biologically relevant metal cations. Fe3 + sensing was performed via the complexation of Fe3 + ions with the chemosensor. In addition, the detection limit of the fluorescence response of the sensor to Fe3 + was 0.31 μM with a rapid response of less than 10 s.