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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Unusual extraction of trivalent f-cations using diglycolamide dendrimers in a room temperature ionic liquid: extraction, spectroscopic and DFT studies
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Unusual extraction of trivalent f-cations using diglycolamide dendrimers in a room temperature ionic liquid: extraction, spectroscopic and DFT studies

机译:在室温离子液体中使用北胆酰胺树枝状体的单次F阳离子的异常提取:提取,光谱和DFT研究

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摘要

The complexation of Am3+ and Eu3+ was studied with three generations of diglycolamide (DGA)-functionalized poly(propylene imine) diaminobutane dendrimers (DGA-Den) with two, four and eight DGA moieties by solvent extraction and luminescence spectroscopy in a room temperature ionic liquid, viz. 3-butyl-1-methyl imidazolium bis(trifluoromethanesulfonyl) imide ([C(4)mim][Tf2N]). The extraction of trivalent f-cations was found to increase with decreasing HNO3 concentrations conforming to a cation exchange mechanism with the extraction of Eu3+ being higher than that of Am3+ in the acid concentration range of 0.01-6.0 M HNO3. The nature of the extracted species showed unusual trends compared to those reported previously in molecular diluents. Fluorescence lifetime data suggested the absence of H2O in the extracted complexes meaning strong inner-sphere complexes. The nature of the extracted complexes predicted by solvent extraction was supported by DFT computations.
机译:通过三代二氯胺(DGA) - 官能化聚(丙烯酰亚胺)二氨基丁烷树枝状丁烷树枝状甲烷(DGA-DEN)用两种,通过溶剂萃取和发光光谱法在室温离子液中进行三代二羟基胺(DGA) - 官能化(丙烯酰亚胺)二氨基丁烷树枝状蛋白丁烷 ,viz。 3-丁基-1-甲基咪唑鎓双(三氟甲磺酰基)酰亚胺([C(4)MIM] [TF2N])。 发现三价F阳离子的提取随着符合阳离子交换机制的降低而浓度的浓度,Eu3 +的浓度高于0.01-6.0mHNO 3的酸浓度范围内的阳离子交换机理。 与以前在分子稀释剂中报道的那些相比,提取物种的性质表现出不寻常的趋势。 荧光寿命数据表明在提取的复合物中没有H2O,意味着强内球复合物。 通过DFT计算支持溶剂提取预测的提取络合物的性质。

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