Shi Lin Zhang, Lu Yu, Yang Liu, John F. Gallagher, Huai Xin Hao, Yong Qiang Wan, Zhi Peng Wang, Jun Li Wang, Tai Hong Yan, Wei Qun Shi, Pavle Mocilac
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引用次数: 0
摘要
在此,我们介绍了新的亲水性三叉配体--双三唑吡嗪。这些配体的设计灵感来源于结构相似且前景广阔的双三唑吡啶(PyTri)配体,以及理论研究提出的用于鞍/镧分离的三叉配体设计标准。对这些配体进行了合成、表征和测试,将其作为用于锑/镧核分离的可能萃取剂。此外,还进行了紫外和荧光研究、pKa 测定以及晶体学和理论研究,以解释其观察到的行为。虽然溶剂萃取研究的结果表明,这些配体在 i-SANEX 条件下萃取 Am 与 Eu 时不具备足够的选择性,但这项研究对十年前理论研究提出的设计用于高级核分离的三叉杂环 N-供体配体的标准进行了一次有价值的检验。我们的实验观察和理论研究发现,这些标准可能并不是在 i-SANEX 条件下设计新型亲水配体进行 An/Ln 分离的最佳指导。
Synthesis and study of bistriazolyl-pyrazines as new ligands for An/Ln separations
Herein, we present new hydrophilic tridentate ligands, bistriazolyl pyrazines. Their design was inspired by structurally similar and promising bis-triazolyl-pyridines (PyTri) ligands as well as theoretically derived criteria for the design of tridentate ligands for An/Ln separations suggested by theoretical studies. These ligands have been synthesised, characterised and tested as possible extractants for An/Ln nuclear separations. In addition, UV and fluorescence studies, pKa determination, and crystallographic and theoretical studies have been performed to explain their observed behaviour. Although the results of the solvent extraction studies have shown that these ligands do not possess sufficient selectivity for the extraction of Am vs Eu in i-SANEX conditions, this study presents a valuable test of the criteria for the design of tridentate heterocyclic N-donor ligands for advanced nuclear separation as postulated by theoretical studies a decade ago. Our experimental observations and theoretical studies have found that these criteria might not be the best guidance for designing novel hydrophilic ligands for An/Ln separations in i-SANEX conditions.
期刊介绍:
Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.