A novel naphthalene-based receptor: Colorimetric and fluorescent PET chemoreceptor for anions

A novel artificial anion receptor based on phenylhydrazone structure was designed, synthesized and characterized. The binding behavior of the receptor to various anions was investigated by UV-vis fluorescence analyses. In addition, 1H NMR experiments were carried out to explore the nature of interaction between receptor 1 and acetate. The processes of sensing can literally be seen through the 'naked-eye' for the sharp color changes from yellow to purple. - Highlights: → The synthesis process of receptor 1 (1-hydroxynaphthalene-2-carbaldehyde-4'-nitrophenylhydrazone) is simple and easy. Thus, it made practical use of receptor 1 possible. → Receptor 1 displays distinct color changes from yellow to purple, which could be observed by the naked eye. In addition, the sensing process is fast and efficient. → Receptor 1 can recognize acetates which is of great importance since acetates are important biological molecules.