Citation: Xue Dong, Zhipeng Wang, Qiang Yan, Haiwang Liu, Yuxiao Guo, Hong Cao, Jing Chen, Chao Xu. Optically "silent" neptunium(V)-nitrate complex in ionic liquid[J]. Chinese Chemical Letters, ;2022, 33(7): 3531-3533. doi: 10.1016/j.cclet.2022.02.057 shu

Optically "silent" neptunium(V)-nitrate complex in ionic liquid

Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China

xuchao@tsinghua.edu.cn

Received Date: 30 December 2021
Revised Date: 20 February 2022
Accepted Date: 21 February 2022
Available Online: 23 February 2022

Figures(3)

The complexation of pentavalent neptunium, Np(V), with nitrate ion in an ionic liquid solution has been studied spectroscopically for the first time. The characteristic f-f transition absorption band of Np(V) in the NIR region changes significantly upon the titration of nitrate ion into the solution, revealing strong complexation of Np(V) with nitrate ion in the ionic liquid. Most notably, the absorption band of Np(V) almost disappears when a sufficiently high concentration of nitrate ion is present in the solution. Such a rare optically "silent" species can be assigned to the 1:2 Np(V)/nitrate complex with a centrosymmetric coordination environment where Np sits at the inversion center.
- Neptunium,
- Ionic liquid,
- Complexation,
- Absorption,
- f-f transition
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沈阳化工大学材料科学与工程学院沈阳 110142