205TL-NMR and UV-Visible spectroscopic determination of the formation constants of aqueous thallium(I) hydroxo-complexes

P. Sipos, S. G. Capewell, P. M. May, G. T. Hefter, G. Laurenczy, F. Lukács, R. Roulet

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The hydrolysis of Tl(I) has been studied at 25°C using 205Tl-NMR spectroscopy and UV-Vis spectrophotometry in aqueous solutions with ionic strengths maintained by NaClO4 at 2, 4, 6, and 8M. The formation constant and the spectral characteristics for the hydroxo complex, TlOH° have been determined. At high hydroxide ion concentrations there is clear evidence from the UV-Vis data for the formation of a Tl(OH)2- species. The spectrum and an estimated formation constant for this second hydroxo complex are also reported.

Original languageEnglish
Pages (from-to)419-431
Number of pages13
JournalJournal of Solution Chemistry
Issue number5
Publication statusPublished - May 1997



  • Concentrated electrolytes
  • Hydroxide
  • Hydroxo complexes
  • TL-NMR spectroscopy
  • Thallium(I)
  • UV-Vis spectrophotometry

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Physical and Theoretical Chemistry

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