Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, USA.
Langmuir. 2010 Jun 1;26(11):8887-92. doi: 10.1021/la9046462.
We demonstrate an effective micelle shuttle between water and a hydrophobic ionic liquid and its application in transportation in the biphasic system, using a commercially available and inexpensive Pluronic block copolymer. The poly(ethylene oxide-b-propylene oxide-b-ethylene oxide) (P123) block copolymer self-assembles into micelles in both water and the ionic liquid, 1-butyl-3-methylimidazolium hexafluorophosphate, as characterized by dynamic light scattering. The poly(ethylene oxide) blocks provide the well-solvated corona, whereas the poly(propylene oxide) blocks form the solvophobic core. The micelles can spontaneously transfer between the two phases upon a simple temperature stimulus; the transfer is reversible and repeatable, and (1)H NMR analysis indicates quantitative transfer. The micelle nanocarriers are used to transport various cargoes in the biphasic system: fully reversible transport of hydrophobic small organic dyes into and out of water and facile extraction of an ionic liquid-phobic polymer from the ionic liquid. This simple round-trip delivery system may be used in delivery, separations, and extraction in synthesis and biphasic catalysis involving ionic liquids.
我们展示了一种有效的胶束穿梭在水和疏水性离子液体之间，并用一种商业上可获得的廉价的 Pluronic 嵌段共聚物在两相体系中的运输中的应用。聚（氧化乙烯- b- 氧化丙烯- b- 氧化乙烯）（P123）嵌段共聚物在水中和离子液体 1-丁基-3-甲基咪唑六氟磷酸盐中自组装成胶束，这可通过动态光散射来表征。聚（氧化乙烯）链段提供了良好溶剂化的冠，而聚（氧化丙烯）链段形成疏溶剂的核。胶束可以在简单的温度刺激下自发地在两相之间转移；转移是可逆和可重复的，并且（1）H NMR 分析表明定量转移。胶束纳米载体用于在两相体系中输送各种货物：疏水性小有机染料完全可逆地进入和离开水，以及从离子液体中容易地提取离子液体疏聚物。这种简单的往返输送系统可用于涉及离子液体的输送、分离和萃取合成和两相催化。
