Quinoline-based chemosensor for fluoride and acetate: A combined experimental and DFT study

摘要

A novel quinoline-based chemosensor L was synthesized and characterized by HRMS, FTIR, ~1H NMR and ~(13)C NMR. The anion recognition ability of L towards different anions was investigated by experimental (naked-eye, UV-visible, fluorescence and ~1H NMR) and theoretical (B3LYP/6-31G(d,p)) methods. In the presence of F~- and AcO~-, L showed naked-eye detectable colour change from light yellow to orange brown with the appearance of a new charge transfer band at ～530 nm in the absorption spectra while a remarkable enhancement was observed in the fluorescence spectra. The spectral titration with TBAOH and ~1H NMR study showed the binding nature of anion with L to follow deprotonation mechanism.