The study of Rh(iii) hydroxocomplexes using capillary zone electrophoresis with a UV-Vis detector: The development of the method

Victoria V. Volchek, Olga V. Shuvaeva, Semen N. Berdyugin, Danila B. Vasilchenko, Sergey V. Korenev

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The expediency of capillary zone electrophoresis application in the study of a mixture of rhodium(iii) hydroxocomplexes is shown for the species formed during the thermal treatment of [Rh(OH)6]3- at 60 °C in alkaline media. As these compounds are unstable in solution because of polycondensation at pH > 10 and the formation of insoluble rhodium(iii) hydroxides at pH 5-10, their acidic derivatives with terminal aqua ligands acted as the objects of the study. Optimal separation conditions were achieved using sodium perchlorate as a background electrolyte, a voltage of +20 kV and pH 2.6. Rhodium(iii) species with different nuclearities were identified in accordance with their UV spectra and the regularities of electrophoretic migration in the capillary. The presence of a dimer was also verified by the spiking of the mixture under investigation with a previously synthesised complex [Rh2(μ-OH)2(H2O)8](NO3)4, which confirms the correct identification.

Original languageEnglish
Pages (from-to)12707-12712
Number of pages6
JournalDalton Transactions
Volume48
Issue number33
DOIs
Publication statusPublished - 7 Sep 2019

Keywords

  • ONE-POT SYNTHESIS
  • PRIMARY AMIDES
  • RHODIUM(III)
  • SPECIATION
  • ALDOXIMES
  • COMPLEXES
  • WATER
  • ACIDS

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