Huaixin Hao, Yaoyang Liu, Xue Dong, Yuxiao Guo, Bin Li, Shuang Liu, Chao Xu, Jing Chen, Zhipeng Wang
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A straightforward organic complexation strategy enables precise and efficient oxidation state control of Np
The recovery of neptunium (Np) from nuclear waste is of paramount importance for mitigating long-term environmental radiotoxicity. However, this endeavor is significantly hindered by the intricate redox chemistry of Np, which necessitates precise control over its oxidation states. Here we present a straightforward and efficient methodology for the quantitative conversion of Np(V) to Np(IV) under catalysis-free and mild conditions, leveraging organic complexation with an array of widely employed tridentate O-donor ligands: N,N,N’,N’-tetramethyl diglycolamide (TMDGA), N,N-dimethyl diglycolamide (DMDGA), and diglycol acid (DGA). Compared to the “free” Np ion, the reduction efficiency of Np(V) unprecedentedly boosts more than 300 times in the case of complexing with TMDGA, thereby opening up a new path to control the oxidation state of Np and supporting the crucial task of Np recovering in spent nuclear fuel reprocessing.
期刊介绍：
Science China Chemistry, co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China and published by Science China Press, publishes high-quality original research in both basic and applied chemistry. Indexed by Science Citation Index, it is a premier academic journal in the field.
Categories of articles include:
Highlights. Brief summaries and scholarly comments on recent research achievements in any field of chemistry.
Perspectives. Concise reports on thelatest chemistry trends of interest to scientists worldwide, including discussions of research breakthroughs and interpretations of important science and funding policies.
Reviews. In-depth summaries of representative results and achievements of the past 5–10 years in selected topics based on or closely related to the research expertise of the authors, providing a thorough assessment of the significance, current status, and future research directions of the field.
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