Two new Eu‐based ionic liquid systems, [C4mim][DTSA] : [Eu(DTSA)3] and 2[C4mim] [DTSA] : [Eu(DTSA)3] were synthesized at 120° under inert conditions from 1‐butyl‐1‐methylimidazolium ditoluenesulfonylamide ([C4mim][DTSA]). The identity and purity of the synthesized compounds were confirmed by elemental analysis, IR, Raman, and 1H‐NMR spectroscopy. As they solidify below 100° 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.
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Tang et al. (2009) studied this question.
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