Modulating extraction and retention of fluorinated β-diketonate metal complexes in perfluorocarbons through the use of non-fluorinated neutral ligands,Inorganic Chemistry Frontiers

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Modulating extraction and retention of fluorinated β-diketonate metal complexes in perfluorocarbons through the use of non-fluorinated neutral ligands
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2021-08-23 , DOI: 10.1039/d1qi00817j
Tyler L. King ₁ , Orhi Esarte Palomero ₁ , Dawson A. Grimes ₁ , Sean T. Goralski ₁ , Richard A. Jones ₁ , Emily L. Que ₁

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Extraction of metal ions into perfluorocarbon solvents using fluorinated ligands has shown promise in a number of applications ranging from catalysis to biomedical imaging. However, the speciation of the extracted metal complexes is poorly understood hindering the design and implementation of new fluorous extraction systems. The extraction of s-, p-, d-, and f-block metal ions from the aqueous phase to the fluorous phase (perfluoro-15-crown-5 ether) with a fluorinated acetylacetonate pro-ligand was investigated and the speciation of the extracted metal complexes characterized, including coordinatively saturated mononuclear and polynuclear species and coordinatively unsaturated mononuclear species. The leaching of these species back into aqueous media was studied along with the effects of synergistic extraction using a combination of fluorinated acac and nonfluorinated neutral ligands. Our findings indicate that formation of coordinatively saturated mononuclear metal complexes in the fluorous phase is essential for retaining extracted species and suggest an important role for synergistic extraction for metal ions that do not form these types of metal complexes with acac ligands alone.

中文翻译：

通过使用非氟化中性配体调节全氟化碳中氟化 β-二酮金属配合物的提取和保留

使用氟化配体将金属离子提取到全氟化碳溶剂中已在从催化到生物医学成像的许多应用中显示出前景。然而，对提取的金属配合物的形态了解甚少，阻碍了新的氟提取系统的设计和实施。研究了使用氟化乙酰丙酮前体配体将 s-、p-、d- 和 f-块金属离子从水相萃取到氟相（全氟-15-冠-5 醚），并研究了提取的金属配合物表征，包括配位饱和单核和多核物种和配位不饱和单核物种。研究了这些物质浸回到水性介质中，以及使用氟化acac 和非氟化中性配体的组合协同提取的效果。我们的研究结果表明，在氟相中形成配位饱和的单核金属络合物对于保留提取的物种是必不可少的，并表明对不单独与 acac 配体形成这些类型的金属络合物的金属离子的协同提取具有重要作用。

更新日期：2021-08-27

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