Complexation of U(VI) with diphenyldithiophosphinic acid: spectroscopy, structure and DFT calculations

  • Dechao Meng
  • Ning Pu
  • Lei Mei
  • Taoxiang Sun
  • Lei Xu
  • Weiqun Shi
  • Jing Chen
  • Chao Xu
Article
  • 38 Downloads

Abstract

The complexation of U(VI) with diphenyldithiophosphinic acid (denoted as HL) in acetonitrile was studied by UV–Vis, FT-IR, crystallography and DFT calculations. UV–Vis absorption spectrophotometry implies that three successive complexes, UO2L+, UO2L2, UO2L3, form in the solution. Significant ligand to metal charge transfer occurs from soft atom S to U(VI) in all the three complexes. A crystal of UO2L2 complex was successfully synthesized from the solution. In the crystal both the two ligands coordinate to U(VI) in bidentate form. DFT calculations confirm the formation of UO2L3 complex and help illustrate the structures of all the U(VI) species in the solution.

Keywords

Uranyl Diphenyldithiophosphinate Complexation Coordination mode 

Notes

Acknowledgements

This work was supported by National Natural Science Foundation of China (Grant Nos. 91426302, 21571114, 51425403) and the Science Challenge Project (JCKY2016212A504). The calculations were performed using supercomputers at Tsinghua National Laboratory for Information Science and Technology.

Supplementary material

10967_2018_5844_MOESM1_ESM.docx (516 kb)
Supplementary material 1 (DOCX 515 kb)

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2018

Authors and Affiliations

  1. 1.Collaborative Innovation Center of Advanced Nuclear Energy TechnologyInstitute of Nuclear and New Energy Technology, Tsinghua UniversityBeijingChina
  2. 2.Key Lab of Radioactive Waste TreatmentTsinghua UniversityBeijingChina
  3. 3.Laboratory of Nuclear Energy Chemistry, Institute of High Energy PhysicsChinese Academy of SciencesBeijingChina

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