New anthracene based fluorescent anion receptor bearing two imidazolium units linked by methylene spacers at 9,10-positions has been synthesized. Complexation behavior and fluorescent properties of the receptor with inorganic anions (Cl - , Br - , I - , NO/, HSO 4 - , and H 2 PO 4 - ) in acetonitrile were investigated by 1 H NMR spectrometric and fluorimetric titrations, and fluorescence lifetime measurement. At low receptor concentration level (0.1 μM), fluorescence of the receptor was quenched by formation of 1:1 host-guest complex with the anions. At relatively higher receptor concentrations (above 1.0 μM), Η 2 PO 4 - anion quenched the monomer emission mainly by the excimer formation due to anion-induced ground state aggregation. Fluorescence lifetime measurements revealed that quenching mechanisms are different between halide ions and oxoanions.