Spontaneous Partitioning of Californium from Curium: Curious Cases from the Crystallization of Curium Coordination Complexes

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• 作者：Samantha K. Cary ; Mark A. Silver ; Guokui Liu ; Jamie C. Wang ; Justin A. Bogart ; Jared T. Stritzinger ; Alexandra A. Arico ; Kenneth Hanson ; Eric J. Schelter ; Thomas E. Albrecht-Schmitt
• 刊名：Inorganic Chemistry
• 出版年：2015
• 出版时间：December 7, 2015
• 年：2015
• 卷：54
• 期：23
• 页码：11399-11404
• 全文大小：337K
• ISSN：1520-510X

文摘

The reaction of ²⁴⁸CmCl₃ with excess 2,6-pyridinedicarboxylic acid (DPA) under mild solvothermal conditions results in crystallization of the tris-chelate complex Cm(HDPA)₃路H₂O. Approximately half of the curium remains in solution at the end of this process, and evaporation of the mother liquor results in crystallization of the bis-chelate complex [Cm(HDPA)(H₂DPA)(H₂O)₂Cl]Cl路2H₂O. ²⁴⁸Cm is the daughter of the 伪 decay of ²⁵²Cf and is extracted in high purity from this parent. However, trace amounts of ^249,250,251Cf are still present in all samples of ²⁴⁸Cm. During the crystallization of Cm(HDPA)₃路H₂O and [Cm(HDPA)(H₂DPA)(H₂O)₂Cl]Cl路2H₂O, californium(III) spontaneously separates itself from the curium complexes and is found doped within crystals of DPA in the form of Cf(HDPA)₃. These results add to the growing body of evidence that the chemistry of californium is fundamentally different from that of earlier actinides.