离子液体铕配合物发光薄膜制备及其荧光性能研究

Preparation and Fluorescence of Eu^(3+)-containing Phosphorous Ionic Liquid Film

合成了一种季磷酸盐功能化离子液体(5-二苯基氧膦基)戊基三苯基膦六氟磷酸盐离子液体([Ph_3PC_5P(O)Ph_2]PF_6),使其与稀土铕离子配位形成离子液体稀土配合物,并将该配合物掺杂到聚丙烯酸甲酯(PMMA)中制得了聚合物发光薄膜.热重分析结果表明,高分子复合膜的热分解温度在330℃以上,铕配合物的加入能有效增强其热稳定性.在紫外光照射下,复合膜能发出强烈铕的特征荧光,其强度随着铕配合物加入量的增加而增强,在实验条件下未出现荧光猝灭现象.本研究成果有望拓展季磷盐功能化离子液体和稀土元素在新材料领域的应用.

In this article, a new phosphorous ionic liquid（[Ph3PC5P（O）Ph2]PF6） is synthesized and is coordinated with Eu^3＋ to obtain the Eu^3＋-containing ionic liquid, Eu（IL）3（NO3）3. In addition, the PMMA films doped with Eu（IL）3（NO3）3（Eu（IL）3（NO3）3 /PMMA） have been prepared by dissolving those two compounds. The further testing results show that the added Eu^3＋ complex can effectively enhance the thermal stability of Eu^3＋ doped films. The films also emit narrow red light strongly under UV lamp, which can be intensified by adding more Eu3＋ and fluorescence quenching is not identified in the conducted experiments.