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Updated: Oct 20, 2025

Gyroid Nickel Nanostructures from Diblock Copolymer Supramolecules
Published on: April 28, 2014
Unprecedented neptunyl(V) cation-directed structural variations in Np2O compounds.
Zhong-Fei Xu1,2, Wen-Jing Zhang1,2, Ping Zhang2
1Department of Physics, University of Science and Technology Beijing, Beijing 100083, China. hushuxian@csrc.ac.cn.
This study explores neptunium (Np) oxide clusters, revealing Np(V) as a key ion for stable structures. Mixed-valent Np(III/V) oxides are predicted, with significant 5f-orbital covalent interactions enhancing understanding of Np oxide bonding.
Area of Science:
- Materials Science
- Inorganic Chemistry
- Computational Chemistry
Background:
- Transuranic oxides offer insights into actinide compound chemical bonding.
- Neptunium (Np) oxide chemistry is characterized by limited stable structures and oxidation states.
Purpose of the Study:
- To systematically investigate neptunium oxide clusters (Np2Ox, x=1-7).
- To computationally study their electronic structures and chemical bonding.
- To understand the role of Np oxidation states in structural stability.
Main Methods:
- Global minimum search for Np2Ox clusters.
- Computational study of electronic structures.
- Analysis of chemical bonding and orbital interactions.
Main Results:
- Np(V) identified as a potential structure-directing ion in Np oxide clusters.
- Mixed-valent Np(III/V) in Np2O4 predicted to be accessible.
- Significant 5f-orbital covalent interactions observed in Np(V)-O bonding.
Conclusions:
- Np(V) plays a crucial role in directing the formation of stable neptunium oxide structures.
- These findings advance the understanding of 5f-electron behavior in actinide chemical bonding.
- Model neptunium oxides provide a basis for future structural design and chemical studies.
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