Lawson Kathryn M, Roach Jordan M, Spano Tyler L, Johnson Katherine R, Martin Leigh R
Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, Tennessee 37830, United States.
ACS Omega. 2025 Jul 17;10(29):31298-31303. doi: 10.1021/acsomega.4c10056. eCollection 2025 Jul 29.
To address the challenge of actinide crystallization in systems with a low chemical potential, solvent displacement crystallization (SDC) techniques are applied to synthesize uranyl oxalate in a series of alcohols with varying solvent polarity. This work demonstrates the simplicity of applying SDC to actinides and indicates that solvent polarity affects crystallizations. Uranyl oxalate trihydrate was synthesized from methanol, ethanol, 1-propanol, and isopropanol as additive solvents, with characterization indicating an absence of solvent influence on the bulk structure. The choice of solvent did cause changes to the observed morphology and particle size. Additionally, the total yield of uranyl oxalate was found to decrease with increasing solvent polarity. These data support the use of SDC techniques for the crystallization of high-solubility actinide compounds.
为应对低化学势体系中锕系元素结晶的挑战，采用溶剂置换结晶（SDC）技术，在一系列具有不同溶剂极性的醇类中合成草酸铀酰。这项工作证明了将SDC应用于锕系元素的简便性，并表明溶剂极性会影响结晶过程。以甲醇、乙醇、1-丙醇和异丙醇作为添加剂溶剂合成了三水合草酸铀酰，表征结果表明溶剂对整体结构没有影响。溶剂的选择确实导致了观察到的形态和粒径的变化。此外，发现草酸铀酰的总产率随溶剂极性的增加而降低。这些数据支持使用SDC技术来结晶高溶解性的锕系元素化合物。
