Anions play an important role in a wide range of chemical and biological processes, and considerable attention has been focused on the design of host molecules that can recognize and sense anion species selectively through the naked eye, electrochemical, and optical responses. Color changes, as signaling an event detected by naked eye, are widely used owing to the inexpensive equipment required or no equipment at all. Those chemosensors are constructed according to the receptor-chromophore binomial, which involves the binding a specific anion substrate with receptor sites and a chromophore responsible for translating the receptor-anion association into an optical signal. Among the important anions, fluoride is of particular interest owing to its established role in preventing dental caries and acetate for the biological importance. Even though some receptor compounds for fluoride have reported, there is a paucity of reports on a selective naked eye chemosensor for those anions. Most of those chemosensors have been constructed based on nitrophenyl group as a signal unit. In pursuit of naked-eye fluoride ion chemosensors a new nitronaphthalene urea derivative 1 was synthesized and its anion binding properties were investigated by UV-vis spectroscopy, H NMR and color changes. Ligand 1 showed a significant bathochromic shifts in the presence of fluoride, indicating that it could be utilized as a naked eye chemosensor owing to the noticeable color change in the presence of fluoride ion.