Skip to main content

Dissociation constants for the zinc(II)-8-hydroxyquinoline complexes in aqueous and sodium dodecyl sulfate micellar solutions


The constants of dissociation of 8-hydroxyquinoline (pK 1 and pK 2) and of its complexation with zinc ions (logβ1, logβ2) in sodium nitrate aqueous solutions at 293 K were calculated by modeling potentiometric titration data. The values of logβ were obtained under conditions such that the complexes occurred simultaneously in the solution and at optimum values of the ionic strength and the ratio between the metal and ligand concentrations. The apparent constants of dissociation of 8-hydroxyquinoline and of its complexation with zinc ions in a 0.01 M sodium dodecyl sulfate solution were calculated. An increase in pK and logβ was explained by the stabilization of the different forms of the ligand and its complexes in the surfactant micellar phase.

This is a preview of subscription content, access via your institution.


  1. A. V. Vinogradov and S. V. Elinson, Hydroxyquinoline (Nauka, Moscow, 1979) [in Russian].

    Google Scholar 

  2. L. M. Ramenskaya, E. P. Grishina, and A. N. Alekseeva, Tekst. Khim., No. 2, 85 (1997).

  3. L. M. Ramenskaya, A. N. Alekseeva, and E. P. Grishina, Zh. Fiz. Khim. 74, 1802 (2000) [Russ. J. Phys. Chem. 74, 1636 (2000)].

    CAS  Google Scholar 

  4. L. M. Ramenskaya, O. V. Kraeva, and T. V. Vladimirova, Zh. Fiz. Khim. 78, 1433 (2004) [Russ. J. Phys. Chem. 78, 1255 (2004)].

    CAS  Google Scholar 

  5. R. Nasanen and U. Penttinen, Acta Chem. Scand. 6, 837 (1952).

    CAS  Google Scholar 

  6. S. Watanabe, W. Frantz, and D. Trottier, Anal. Biochem. 5 (4), 345 (1963).

    Article  CAS  Google Scholar 

  7. V. P. Vasil’ev, G. A. Zaitseva, N. V. Provorova, et al., Zh. Obshch. Khim. 54 (9), 2085 (1984).

    CAS  Google Scholar 

  8. R. Berg, Die analytische Verwendung von O-Oxychinolin (“Oxin”) und seiner Derivate (F. Enke, Stuttgart, 1938; Khim. Literatura, Moscow, 1937) [in Russian].

    Google Scholar 

  9. N. A. Mattola and N. Friesser, Talanta 13, 55 (1966).

    Google Scholar 

  10. P. P. Korostelev, Preparation of Solutions for Chemical Analysis (Nauka, Moscow, 1964), p. 400 [in Russian].

    Google Scholar 

  11. V. A. Borodin, V. P. Vasil’ev, and E. V. Kozlovskii, Mathematical Problems in Chemical Thermodynamics (Nauka, Novosibirsk, 1985), p. 219 [in Russian].

    Google Scholar 

  12. V. P. Vasil’ev, Thermodynamic Properties of Electrolyte Solutions (Vysshaya Shkola, Moscow, 1982), p. 320 [in Russian].

    Google Scholar 

  13. R. M. Smith and A. E. Martell, Critical Stability Constants (Plenum, London, 1976), Vol. 2.

    Google Scholar 

  14. L. M. Ramenskaya and T. V. Vladimirova, Kolloidn. Zh. 67, 231 (2005) [Colloid J. 67, 201 (2005)].

    Google Scholar 

  15. R. R. Amirov, Z. A. Saprykova, N. A. Ulakhovich, and Z. Z. Ibragimova, Zh. Obshch. Khim. 68, 1946 (1998) [Russ. J. Gen. Chem. 68, 1864 (1998)].

    Google Scholar 

Download references

Author information

Authors and Affiliations


Additional information

Original Russian Text © L. M. Ramenskaya, O. V. Kraeva, 2006, published in Zhurnal Fizicheskoi Khimii, 2006, Vol. 80, No. 1, pp. 100–105.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Ramenskaya, L.M., Kraeva, O.V. Dissociation constants for the zinc(II)-8-hydroxyquinoline complexes in aqueous and sodium dodecyl sulfate micellar solutions. Russ. J. Phys. Chem. 80, 90–94 (2006).

Download citation

  • Received:

  • Issue Date:

  • DOI:


  • Surfactant
  • Ionic Strength
  • Sodium Dodecyl Sulfate
  • Dissociation Constant
  • Potentiometric Titration