Abstract
The stability constants of gold(I) thiosulfate complexes have been determined by differential UV spectroscopy. The aqueous solutions contained 6 × 10−4 mol·dm−3 Na3Au(S2O3)2 and a variable amount of Na2S2O3 to vary the Au:S2O3 ratio over the range 1:5–1:200 and NaClO4 to maintain a constant ionic strength. The measurement of the absorbance of the solutions under investigation has been made in the range 220–300 nm with respect to reference solutions containing all constituents except gold(I) complexes. The stability constant values have been determined to be log10 β 1 (\( {\text{AuS}}_{2} {\text{O}}_{3}^{ - } \)) = 17.43 (±0.05), log10 β 2 \(({\text{Au}}({{\text{S}}_{2}{\text{O}}_{3}})_{2}^{3-})\) = 23.81 (±0.05) at an ionic strength of the solution of 0.5 mol·dm−3 (NaClO4) and a temperature of 295 K. These values are close to the log10 β values which are predicted on the basis of correlation relationships.
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References
Rapson, W.S., Groenewald, T.: Gold Usage. Academic Press Inc, London (1978)
Kohl, P.: Electrodeposition of gold. In: Schlesinger, M., Paunovic, M. (eds.) Modern electroplating, pp. 201–226. John Wiley and Sons, New York (2000)
Green, T.A., Roy, S.: Speciation analysis of Au(I) electroplating baths containing sulfite and thiosulfate. J. Electrochem. Soc. 153, C157–C163 (2006)
Aylmore, M.G., Muir, D.M.: Thiosulfate leaching of gold—a review. Miner. Eng. 14, 135–174 (2001)
Perera, W.N., Senanayake, G.: The ammine, thiosulfato, and mixed ammine/thiosulfato complexes of silver(I) and gold(I). Inorg. Chem. 43, 3048–3056 (2004)
Johnson, B.F.G., Davis, R.: Gold. In: Bailar, J.C., et al. (eds.) Comprehensive Inorganic Chemistry, vol. 3, pp. 129–186. Pergamon Press, Oxford (1973)
Cotton, S.A.: Chemistry of Precious Metals. Blackie Academic and Professional, London (1997)
Webster, J.G.: The solubility of gold and silver in the system Au–Ag–S–O2–H2O at 25 °C and 1 atm. Geochim. Cosmochim. Acta 50, 1837–1845 (1986)
Smith, R.M., Martell, A.E.: Critical Stability Constants. Inorganic Complexes, vol. 4. Plenum Press, New York (1976)
Hiskey, B.J., Atluri, V.P.: Dissolution chemistry of gold and silver in different lixiviants. Miner. Process. Extr. Metall. Rev. 4, 95–134 (1988)
Sullivan, A.M., Kohl, P.A.: Electrochemical study of the gold thiosulfate reduction. J. Electrochem. Soc. 144, 1686–1690 (1997)
Hogfeldt, E. (ed.): Stability Constants of Metal-Ion Complexes. Part A: Inorganic Ligands. Pergamon, Oxford (1982)
Bard, A.J., Jordan, J., Parsons, R. (eds.): Standard Potentials in Aqueous Solution. Dekker, New York (1985)
Pouradier, J., Gadet, M.C.: Electrochemie des sels d’or. VII Aurothiosulfate. J. Chim. Phys. Phys. Chim. Biol. 66, 109–112 (1969)
Skibsted, L.H., Bjerrum, J.: Studies on gold complexes. III: The standard electrode potentials of aqua gold ions. Acta Chem. Scand. A 31, 155–156 (1977)
Senanayake, G.: Gold leaching in non-cyanide lixiviant systems: critical issues on fundamentals and applications. Miner. Eng. 17, 785–801 (2004)
De Marco, D., Bellomo, A., DeRobertis, A.: Formation and thermodynamic properties of Ag(I) complexes with S2O3 2−, SCN2H4 and SCN− as ligands. J. Inorg. Nucl. Chem. 42, 599–609 (1980)
Sillen, L.G., Martell, A.E.: Stability Constants of Metal-Ion Complexes. Chemical Society, London (1964)
Orlik, M., Galus, Z.: Electrochemistry of gold. In: Bard, A.J., Stratmann, M. (eds.) Encyclopedia of Electrochemistry, Inorganic Electrochemistry, vol. 7, pp. 839–912. Wiley-VCH, Weinheim (2006)
Beck, M., Nagypal, I.: Chemistry of Complex Equilibria. Akademiai Kiado, Budapest (1990)
Hancock, R.D., Finkelstein, N.P., Evers, A.: Linear free energy relationships in aqueous complex-formation reactions of the d 10 metal ions. J. Inorg. Nucl. Chem. 36, 2539–2543 (1974)
Harris, W.R., Sheldon, J.: Equilibrium constants for the binding of aluminum to human serum transferring. Inorg. Chem. 29, 119–124 (1990)
De Aspuru, E.O., Zaton, A.M.: Usefulness of difference spectroscopy in the study of the binding of uracil derivatives to human serum albumin. J. Biochem. Biophys. Methods 27, 87–94 (1993)
Bertsch, M., Mayburd, A.L., Kassner, R.J.: The identification of hydrophobic sites on the surface of proteins using absorption difference spectroscopy of bromophenol blue. Anal. Biochem. 313, 187–195 (2003)
Brown, H.: Sodium aurothiosulfate. A simple method for its preparation. J. Am. Chem. Soc. 49, 958–959 (1927)
Kraus, W., Nolze, G.: Powder Cell for Windows (version 2.3). Federal institute for materials research and testing, Berlin (1999)
Kholin, Yu. V.: Quantitative physicochemical analysis of complexation in solutions and on the surface of complexing silicas: Meaningful models, mathematical methods and their application. Folio, Kharkov (2000). http://www-chemo.univer.kharkov.ua/kholin/clinp.html. Accessed 16 Aug 2015
Baggio, R.F., Baggio, S.: Crystal and molecular structure of trisodium dithiosulphate aurate(I), dihydrate, Na3[Au(S2O3)2]·2H2O. J. Inorg. Nucl. Chem. 35, 3191–3200 (1973)
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Stezeryanskii, E., Vyunov, O. & Omelchuk, A. Determination of the Stability Constants of Gold(I) Thiosulfate Complexes by Differential UV Spectroscopy. J Solution Chem 44, 1749–1755 (2015). https://doi.org/10.1007/s10953-015-0371-8
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DOI: https://doi.org/10.1007/s10953-015-0371-8