Fluorous nanodroplets structurally confined in an organopalladium sphere
Fluorous nanodroplets structurally confined in an organopalladium sphere
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DOI：
10.1126/science.1129830
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发表时间：
2006-09-01
期刊：
影响因子：
56.9
通讯作者：
Fujita, Makoto
中科院分区：
文献类型：
--
作者：
Sato, Sota;Iida, Junya;Fujita, Makoto
在有机合成中，氟相具有独特的性质，在分离、提纯和反应控制方面具有重要的应用价值。在这里，我们报道了由24个全氟烷基链组成的液状氟液滴的形成，该液滴由12个钯离子和24个桥联配体自发组装在一个5纳米大小的近似球形的壳层的内部。结晶学分析证实其为刚性壳体骨架和无定形内部。全氟烷烃可以在这种明确的氟相中溶解，而它们几乎不能溶解在周围的极性有机溶液中，它们的溶解度(每个球形络合物最多类似于8个全氟烷烃分子)可以通过调节连接到壳层的全氟烷基链的长度进行精细控制。
The distinct properties of fluorous phases are practically useful for separation, purification, and reaction control in organic synthesis. Here, we report the formation of a liquid-like fluorous droplet, composed of 24 perfluoroalkyl chains confined in the interior of a 5-nanometer-sized, roughly spherical shell that spontaneously assembled in solution from 12 palladium ions and 24 bridging ligands. Crystallographic analysis confirmed the rigid shell framework and amorphous interior. Perfluoroalkanes can dissolve in this well-defined fluorous phase, whereas they can hardly dissolve in a surrounding polar organic solution, and their solubility (up to similar to eight perfluoroalkane molecules per spherical complex) can be finely controlled by tuning the length of perfluoroalkyl chains tethered to the shell.