E. Watanabe, Y. Kasamatsu, T. Yokokita, S. Hayami, Katsuma Tonai, H. Ninomiya, N. Kondo, Y. Shigekawa, H. Haba, Y. Kitagawa, M. Nakano, A. Shinohara
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引用次数: 0
Abstract
ABSTRACT Anion-exchange behavior of Zr, Hf, and Th in nitric acid was investigated to determine suitable experimental conditions for the experiment of element 104, rutherfordium (Rf) and to obtain comparative data for discussion of nitrate complexes of Rf. Anion-exchange reactions in a Adogen 464/HNO3 system was found to reach equilibrium within 60 s, suggesting that the reaction system is suitable for the experiment of 261Rf having a half-life of 68 s. We also studied the electronic states of Zr, Hf, and Th nitrate complexes by quantum chemical calculations. The calculation results support the experimental results that Th4+ forms stable anionic complexes such as [Th(NO3)6]2− with a large coordination number of 12, while Zr4+ and Hf4+ do not.
期刊介绍：
Solvent Extraction and Ion Exchange is an international journal that publishes original research papers, reviews, and notes that address all aspects of solvent extraction, ion exchange, and closely related methods involving, for example, liquid membranes, extraction chromatography, supercritical fluids, ionic liquids, microfluidics, and adsorption. We welcome submissions that look at: The underlying principles in solvent extraction and ion exchange; Solvent extraction and ion exchange process development; New materials or reagents, their syntheses and properties; Computational methods of molecular design and simulation; Advances in equipment, fluid dynamics, and engineering; Interfacial phenomena, kinetics, and coalescence; Spectroscopic and diffraction analysis of structure and dynamics; Host-guest chemistry, ion receptors, and molecular recognition.
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