ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Dimerization of methylene-blue in aqueous-solutions of inorganic electrolytes

M. Liška, Ľ. Bartoš, and J. Valášek

Corporate Laboratory for Basic Research of Glass, Centre for Chemical Research, Slovak Academy of Sciences and Research and Development Institute of Glass Industry, CS-91250 Trenčín

Abstract: Using the strong electrolytes theory and statistical methods, the con­centration equilibrium constants for methylene blue dimerization in aque­ous solutions of inorganic electrolytes were evaluated as a function of ionic strength of the solutions. Thus the values of thermodynamic equilibrium constant were obtained. The reaction enthalpy values of the dimerization were calculated from the temperature dependence of the thermodynamic equilibrium constant. On the basis of the results obtained, a method has been proposed so that the dimerization degree might be calculated for chosen values of ionic strength, temperature, and total concentration of methylene blue.

Full paper in Portable Document Format: 432a303.pdf

Chemical Papers 43 (2) 303–313 (1989)