Synthesis, Characterization, and Spectroscopic Investigation of Anthranilic Acid Ionic Liquids

In this study, the synthesis and characterization of a series of new ionic liquids are achieved. the synthesis of ionic liquids was obtained via the acid-base neutralization reaction. the acid-base neutralization reaction was carried out by the reaction of anthranilic acid with tetraethylammonium hydroxide, tetrapropylammonium hydroxide and tetrabutylammonium hydroxide in water individually. the resulted products of ionic liquids were in good yield and purity. the ionic liquids are characterized by use of 1h nmr spectroscopy, thermal gravimetric analysis, uv-vis spectroscopy, and fluorescence spectroscopy. the obtained results using 1h nmr analysis were in a very good agreement with chemical structure of synthesized ionic liquids. in addition, the results of thermal gravimetric analysis suggested that these ionic liquids have good thermal stability. both fluorescence and uv-vis spectroscopy measurements provided that these ionic liquids have the same spectral profile. time-based fluorescence steady-state measurements also showed that these ionic liquids have a high photostability.