Abstract
Thiazole Schiff bases 2-(4-phenyl-1,3-thiazol-2-yliminomethyl)phenol (L-1) and 1-(4-phenyl-1,3-thiazol-2-yliminomethyl)naphthalen-2-ol (L-2) have synthesized and characterized. The interaction of Schiff bases with different metal ions has been studied over UV-vis absorption spectra and photofluorescent spectra. The results are indicated that Schiff base L-1 and L-2 exhibited turn-on fluorescent behavior with Al3+ ions in methanol, which could be directly detected by the naked-eye under the UV-lamp. The limits of detection were calculated for L-1 and L-2 since 1.0 x 10(-6) and 7.5 x 10(-7) by the titration method. Both sensors exhibited excellent fluorescent behavior in 5.0-13.5 pH range. The fluorescent behavior of legends-aluminum complex solution goes to turn-off in the presence of Ni2+ and EDTA. (C) 2013 Elsevier B.V. All rights reserved.