Condensation Product of 1-Naphthaldehyde and 3-Aminophenol: Fluorescent "on" Probe for Ce³⁺and "off" Probe for...

A new probe (Z)-3-((naphthalen-1-ylmethylene)amino)phenol has been synthesized by condensation reaction between 1-naphthaldehyde and 3-aminophenol for the fluorescent sensing of Ce³⁺ by "on" mode and dichromate (Cr₂O₇^2-) by "off" mode. Metal ions-Ag⁺, Al³⁺, As³⁺, Ba²⁺, Ca²⁺, Cd²⁺, Ce⁴⁺, Co²⁺, Cr³⁺, Cr⁶⁺, Cu²⁺, Fe²⁺, Fe³⁺, Hg²⁺, K⁺, La⁺, Li⁺, Mg²⁺, Mn²⁺, Na⁺, Ni²⁺, Pb²⁺, Zn²⁺and anions Br^-, C₂O₄^2-, CH₃COO^-, Cl^-, CO₃^2-, F^-, H₂PO₄^-, HCO₃^-, HF₂^-, HPO₄^2-, I^-, MnO₄^-, NO₃^-, OH^-, S^2-, S₂O₃^2-, SCN^-, SO₄^2- do not interfere. The limit of detection (LOD) for sensing Ce³⁺ and Cr₂O₇^2- ions are 1.286 × 10^-7 M and 6.425 × 10^-6 M, respectively.