Emission response towards three anions (F~-, HSO_4~- and AcO~-) by a luminescent europium ternary complex with a 2-arylimidazole-1,10-phenanthroline conjugate

摘要

A novel ternary 2-(2-carboxylphenyl)imidazo4,5-f-1,10-phenanthroline-based europium(III) 2-thenoyltrifluoroacetonate complex with red luminescence was designed and prepared for anion recognition. Spectroscopic studies, including UV-vis, fluorescence and NMR, showed that the sensor exhibited striking emission changes in response to fluoride (green), hydrogen sulfate (blue) and acetate anions (pale blue) due to hydrogen bonding and competitive coordination with the Eu(ra) ions.