Luminescent Soft Material: Two New Europium-Based Ionic Liquids

Two new Eu-based ionic liquid systems, [C(4)mim][DTSA]:[Eu(DTSA)(3)] and 2[C(4)mim] [DTSA]:[Eu(DTSA)3] were synthesized at 120`degrees under inert conditions from 1-butyl-1-methylimidazolium ditoluenesulfonylamide ([C(4)mim][DTSA]). The identity and purity of the synthesized compounds were confirmed by elemental analysis, IR, Raman, and H-1-NMR spectroscopy. As they solidify below 100 degrees as glasses they qualify as ionic liquids. Fluorescence measurements show that the materials exhibit a strong red luminescence of high color purity. Therefore, they have the potential to be used for optical applications such as in emission displays.