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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >A diglycolamide-functionalized TREN-based dendrimer with a 'crab-like' grip for the complexation of actinides and lanthanides
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A diglycolamide-functionalized TREN-based dendrimer with a 'crab-like' grip for the complexation of actinides and lanthanides

机译：一种氨基甲胺官能化的基于旋转的树枝状树枝状大分子，具有“螃蟹样”抓握散曲线和镧系元素的络合物

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摘要

A generation 1 dendrimer, based on tris(2-aminoethyl)amine (TREN), containing six diglycolamide (DGA) pendent arms (termed TREN-G1-DGA) was synthesized and evaluated for the extraction of actinides and fission product ions. Solvent extraction studies indicated preferential extraction of Eu3+ over Am3+ with a separation factor value of ca. 4.5 in line with the extraction behaviour of multiple DGA ligands in previous reports. The distribution values of Am3+ and Eu3+ were about 12 and 9 times higher, respectively, than those obtained in the case of TREN-DGA using the 1 x 10(-3) M ligand in 5% iso-decanol/95% n-dodecane at 3 M HNO3. The 1:1 (M:L) extracted species suggested inclusion' complex formation where more than one DGA moiety participates in the complex formation. The extracted species were devoid of any inner-sphere coordinated water molecules as confirmed by luminescence spectroscopy. The structure of the complex was also studied by DFT computations and EXAFS which suggested binding of three DGA arms around the central metal ion in the absence of any inner-sphere nitrate ions.
机译：合成基于Tris（2-氨基乙基）胺（Tren），含有六个氨基甲酰胺（DGA）侧臂（称为Tren-G1-DGA）的1种树枝状聚合物，并评估辐射曲线和裂变产物离子的提取。溶剂萃取研究表明，通过CA的分离因子值表明EU3 +的优先提取。 4.5符合先前报告中多个DGA配体的提取行为。 AM3 +和EU3 +的分布值分别比在5％ISO-癸醇/ 95％N-十二烷下的1×10（3）M配体的Tren-DGA的情况下获得的约12和9倍。在3米HNO3。 1：1（m：l）提取物种建议包含的络合物形成，其中多于一个DGA部分参与复杂的形成。提取的物种缺乏由发光光谱证实的任何内球配位的水分子。还通过DFT计算和EXAF来研究复合物的结构，其在不存在任何内球硝酸根离子的情况下建议三个DGA臂在中央金属离子周围结合。

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