Ratiometric chemosensor for fluorescent determination of Zn2+ in aqueous ethanol

A new ratiometric and selective fluorescent chemosensor (1) for quantification of zinc ions in aqueous ethanol has been synthesized and investigated in this work. In an environmentally friendly media of 30% (v/v) water/ethanol and 10 mM Tris–HCl neutral buffer (pH 7.03), 1 displayed selective Zn2+ ratiometric fluorescence response, with a dynamic working range of 1.0–8.0 μM and a detection limit of 0.5 μM Zn2+. The determination of Zn2+ in synthesized water sample was also successful.