Isotope Effects in Oxidation-Reduction Reaction

氧化还原反应中的同位素效应

• 批准号: 07808054
• 负责人: FUJII Yasuhiko
• 金额: $ 1.34万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07808054/
• 关键词: Amalgam; Alkali Metal Elements; Alkaline Earth Elements; Electrolysis; Isotope Effects; Mass Analysis; Isotope-Ratio Measurement; Oxidation-Reduction; 酸化還元; カリウム

Amalgam electrolysis was investigated as the most appropriate system for the research into the isotope effects in oxidation-reduction reactions. The elements of potassium, rubidium, magnesium and barium were selected and the isotope effects of these elements were experimentally studied at different temperatures. Attention was placed on the temperature effects of the isotopic distribution between two phases or the isotope separation coefficient.Two types of the isotope effects have been observed in the amalgam electrolytic processes of potassium and barium ; kinetic isotope effects and equilibrium isotope effects. In kinetic process, where there exists a net mass transfer between two phases, lighter isotope moves faster the other in the direction of the mass transfer. In equilibrium state, where there is no change in the concentrations, heavier isotope is likely fractionated in the amalgam phase in the experimental temperature region. The isotope effects lithium (reported) , rubidium and magnesium in the equilibrium state are different ; lighter isotope is fractionated in the amalgam phase, however, it is very interesting that the following equation is applicable to all amalgam isotope effects in equilibrium considered in the present work.epsilon=A/T+B/T^2

汞齐电解被研究为对氧化还原反应中同位素效应的研究最合适的系统。选择了钾，rub，镁和钡的元素，并在不同温度下对这些元素的同位素效应进行了研究。注意两个阶段之间同位素分布的温度影响或同位素分离系数之间的温度影响。在钾和钡的汞合金电解过程中，已经观察到了两种同位素效应。动力学同位素效应和平衡同位素效应。在动力学过程中，存在两个阶段之间的净质量转移的地方，较轻的同位素在传质方向上移动的速度更快。在浓度没有变化的平衡状态下，在实验温度区域的合并相中，较重的同位素可能会分离。平衡状态下的同位素效应锂（报道），rubidium和镁不同。较轻的同位素是在汞合金阶段分离的，但是，有趣的是，以下方程适用于当前工作中考虑的所有汞合金同位素效应。epsilon= a/t+b/t^2

项目成果

Dan Chen: "Isotope Effects of Magnesium in Amalgam/Organic Solution Systems" J.Chem.Soc.Faraday Trans. (im print).

Dan Chen：“镁在汞齐/有机溶液系统中的同位素效应”J.Chem.Soc.Faraday Trans。

Masao Nomura et al.: "Mass Dependence of Uranium Isotope Effects in the U(IV)-U(VI) Exchange Reaction" J.Am.Chem.Soc.118(38). 9127-9130 (1996)

Masao Nomura 等人：“U(IV)-U(VI) 交换反应中铀同位素效应的质量依赖性”J.Am.Chem.Soc.118(38)。

Zheng Chang, Masao Nomura, Kayoko Motomiya and Yasuhiko Fujii: "Isotope Effects of Barium in Amalgam/Aqueous Hydroxide Solution Systems" J.Chem.Soc.Faraday Trans.92(22). 4485-4489 (1996)

Cheng Chang、Masao Nomura、Kayoko Motomiya 和 Yasuhiko Fujii：“汞齐/氢氧化水溶液系统中钡的同位素效应”J.Chem.Soc.Faraday Trans.92(22)。

Takasi Nakanishi, Nobuhiko Higuchi, Masao Nomura, Masao Aida and Yasuhiko Fujii: "Enrichment of U-232 by U(IV)-U(VI) Redox Ion Exchange Chromatography" J.Nucl.Sci.Technol.33(4). 341-345 (1996)

Takasi Nakanishi、Nobuhiko Higuchi、Masao Nomura、Masao Aida 和 Yasuhiko Fujii：“通过 U(IV)-U(VI) 氧化还原离子交换色谱法富集 U-232”J.Nucl.Sci.Technol.33(4)。

T.Nakanishi et al.: "Enricment of U-232 by U (IV)-U (VI) Redox Ion Exchange Chromatography" J.Nucl.Sci. Technol.33(4). 341-345 (1996)

T.Nakanishi 等人：“通过 U (IV)-U (VI) 氧化还原离子交换色谱法浓缩 U-232”J.Nucl.Sci。