1,13-Dichloro-4,7,10-trioxatridecane (2-[2-(1-chloro-2-ethoxy)ethoxy]ethyl chloride) (3a) was synthesized by a chlorination of 1,13-dihydroxy-4,7,10-trioxatridecane (triethylene glycol). And it was treated with imidazole and sodium ethoxide to give the 1N,1N′-tris(oxoethylene)-diimidazole (3b), which was then converted to ionic liquid-type crown ether (ILCE) 3 with a reaction with 1,9-dichloro-3,6-trioxaoctane (2a). Further, the anion of ILCE was exchanged by an anion-exchange method. Ultimately, we developed a very efficient synthetic pathway for ILCEs 1–4 which have various physical and chemical characteristics by a modification of the polyethylene glycol chain length and anions. 85Sr2+ was successfully extracted into the [(3,2)OEtIm][Cl] (3) phase, but it was not extracted into the [(2,2)OEtIm][Cl] (1), [(3,3)OEtIm][Cl] (2), and [(4,3)OEtIm][Cl] (4) phases.
1,13-二
氯-4,7,10-三氧杂
十三烷(2-[2-(1-
氯-2-乙氧基)乙氧基]乙基
氯)(3a)通过1,13-二羟基-4,7,10-三氧杂
十三烷(
三乙二醇)的
氯化反应合成。然后将其与
咪唑和
乙醇钠反应,得到1N,1N′-三(氧
乙烯)二
咪唑(3b),再通过与1,9-二
氯-3,6-三氧杂
辛烷(2a)反应,转化为
离子液体型
冠醚(ILCE)3。进一步通过阴离子交换方法交换ILCE的阴离子。最终,我们通过改变聚
乙二醇链长和阴离子,开发出具有不同物理和
化学特性的ILCEs 1-4的高效合成途径。85Sr2+成功地被提取到[(3,2)OEtIm][Cl](3)相中,但未被提取到[(2,2)OEtIm][Cl](1)、[(3,3)OEtIm][Cl](2)和[(4,3)OEtIm][Cl](4)相中。