School of Chemical Engineering and Technology, Hebei University ofTechnology, 300130 Tianjin, P. R. China.
Chem Asian J. 2011 Jun 6;6(6):1443-9. doi: 10.1002/asia.201000872. Epub 2011 Apr 20.
Herein we report the synthesis of propanoic acid functionalized ionic liquids (ILs) with various lengths of alkyl chain on the imidazole ring. The synthesized propanoic acid functionalized ILs were used to dissolve Eu(2)O(3) (or Tb(4)O(7)) due to the formation of europium(III) (or terbium(III)) carboxylate, aimed to get soft luminescent materials combining the properties of ILs and attractive luminescent properties of lanthanide ions. The luminescent behavior of Eu(3+) and Tb(3+) in the ILs were investigated by luminescence spectroscopy. The affect of the alkyl chain on the luminescent behavior (the asymmetry parameter (R), the lifetime of (5)D(0), and the (5)D(0) quantum efficiency) of Eu(3+) has been discussed.
在这里，我们报告了具有不同长度的烷基链的丙酸功能化离子液体（ILs）的合成，这些 ILs 在咪唑环上具有丙酸功能。由于形成了镧系元素（III）羧酸酯，合成的丙酸功能化 ILs 被用于溶解 Eu(2)O(3)（或 Tb(4)O(7))，旨在获得将 ILs 的特性与镧系离子的诱人发光特性结合起来的软发光材料。通过荧光光谱研究了 Eu(3+)和 Tb(3+)在 ILs 中的发光行为。讨论了烷基链对 Eu(3+)的发光行为（不对称参数 (R)、(5)D(0)的寿命和 (5)D(0)量子效率）的影响。
