Abstract
The ν1 symmetric vibrational frequency of UO2 2+ in chloride solutions was studied by Raman spectrometry and ab initio calculations. The ν1 frequency experimentally obtained decreased with the increase of concentration of Cl in solvent chlorides. This is attributable to that hydration water molecules in the equatorial plane of UO2 2+ are substituted by Cl− ions, which was consistent with the calculation results. The theoretical part was expanded to aqua- and chloro- Np(VI) complexes. The ν1 frequencies of neptunyl species computed were acceptable compared with the reported Raman shifts.
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This research was partly supported by Grants-in-Aid for Scientific Research (No. 26420869) from the Ministry of Education, Culture, Sports, Science and Technology, Japan.
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Fujii, T., Uehara, A., Kitatsuji, Y. et al. Theoretical and experimental study of the vibrational frequencies of UO2 2+ and NpO2 2+ in highly concentrated chloride solutions. J Radioanal Nucl Chem 303, 1015–1020 (2015). https://doi.org/10.1007/s10967-014-3340-6
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DOI: https://doi.org/10.1007/s10967-014-3340-6