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 mu M and a detection limit of 0.5 mu M Zn2+. The determination of Zn2+ in synthesized water sample was also successful. (C) 2008 Elsevier B.V. All rights reserved.