Journal of Solution Chemistry

, Volume 42, Issue 9, pp 1729–1747 | Cite as

Speciation and Stability of Dioxovanadium(V) Complexes with Diethylenetriaminepentaacetic Acid at Different Ionic Strengths

  • Kavosh Majlesi
  • Saghar Rezaienejad
  • Sara Balali


UV spectroscopic measurements have been used to determine the binding ability of diethylenetriaminepentaacetic acid (DTPA) ligand towards the \( {\text{VO}}_2^+ \) ion at different ionic strengths of sodium chloride (0.11–0.95 mol·dm−3) and at T = 298 K. Dissociation constants of DTPA have been gathered from the literature. Calculations allowed us to identify the formation of three species VO2H3L, VO2H2L and VO2HL2− in the pH range of about 1.00–2.50. All of these complexes were characterized in terms of their stability constants on the basis of two different thermodynamic models (extended Debye–Hückel type and specific ion interaction theory) for the investigation of the ionic strength dependence of the stability and dissociation constants. Comparison with literature data is also reported.


Thermodynamics UV spectroscopy SIT EDH 


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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Kavosh Majlesi
    • 1
  • Saghar Rezaienejad
    • 1
  • Sara Balali
    • 1
  1. 1.Department of Chemistry, Science and Research BranchIslamic Azad UniversityTehranIran

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