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

Dalton Transactions : an International Journal of Inorganic Chemistry
Victoria V VolchekSergey V Korenev

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.

References

Sep 25, 2001·Fresenius' Journal of Analytical Chemistry·S S AleksenkoA R Timerbaev
Feb 14, 1996·Inorganic Chemistry·Alexander DrljacaThomas W. Swaddle
Feb 28, 2002·Journal of Chromatography. a·Andrei R TimerbaevBernhard K Keppler
Oct 27, 2009·Inorganic Chemistry·Natallia TorapavaIngmar Persson
Apr 4, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Natallia TorapavaIngmar Persson

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Citations

Sep 16, 2020·Analytical Methods : Advancing Methods and Applications·Victoria V VolchekSergey V Korenev

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Methods Mentioned

BETA
ion exchange chromatography
ion
electrophoresis

Software Mentioned

Agilent
ChemStation

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