酸溶液中氧化剂对镎（VI）的作用

IF 1 Q4 CHEMISTRY, INORGANIC & NUCLEAR

Radiochemistry Pub Date : 2025-08-07 DOI:10.1134/S1066362225030026

V. P. Shilov, A. M. Fedoseev

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引用次数: 0

摘要

在рН 1.5-2.5溶液中，不饱和磷钨酸盐阴离子P2W17O6110 -稳定的铽（IV）缓慢氧化NpO22+·5H2O。在此过程中产生的Np（VII）阳离子保留了Np（VI）的周围，即保持了五边形双金字塔。因此，Np(VII)/(VI)偶对的氧化电位高于Np（VII）阴离子酸化产生的Np（VII）偶对保留八面体环境的氧化电位。具有五边形双金字塔结构的Np（VII）的高电位使得Np（VII）不稳定。我们用过硫酸盐、过氧化物和二氟化氙等强氧化剂都不能得到它。在含有过硫酸盐或ХеО3 （рН 1.5-3）的脱氧溶液中，闪蒸辐射分解可能成为氧化Np（VI）的有效工具。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Action of Oxidants on Neptunium(VI) in Acid Solutions

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Action of Oxidants on Neptunium(VI) in Acid Solutions

In solutions with рН 1.5–2.5, terbium(IV) stabilized with unsaturated phosphotungstate anions P₂W₁₇O₆₁^10– slowly oxidizes NpO₂²⁺·5H₂O. The Np(VII) cation arising in the process preserves the surrounding of Np(VI), i.e., remains a pentagonal bipyramid. Therefore, the oxidation potential of the Np(VII)/(VI) couple is higher than that of the couple in which Np(VII) generated by acidification of the Np(VII) anion preserves the octahedral surrounding. High potential of Np(VII) with the structure of a pentagonal bipyramid makes Np(VII) unstable. We failed to obtain it using such strong oxidants as persulfate, perxenate, and xenon difluoride. Flash radiolysis may become an effective tool for oxidizing Np(VI) in deaerated solutions containing persulfate or ХеО₃ at рН 1.5–3.

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来源期刊

Radiochemistry CHEMISTRY, INORGANIC & NUCLEAR-

CiteScore

1.30

自引率

33.30%

发文量

期刊介绍： Radiochemistry is a journal that covers the theoretical and applied aspects of radiochemistry, including basic nuclear physical properties of radionuclides; chemistry of radioactive elements and their compounds; the occurrence and behavior of natural and artificial radionuclides in the environment; nuclear fuel cycle; radiochemical analysis methods and devices; production and isolation of radionuclides, synthesis of labeled compounds, new applications of radioactive tracers; radiochemical aspects of nuclear medicine; radiation chemistry and after-effects of nuclear transformations.