Association of Complex Ferrumcyanide Anions with Pinacyanol Cation in Aqueous Solution

Abstract

The possibility of associates formation between complex ferrumcyanide anions [Fe(CN) 6 ] 3-, [Fe(CN) 6 ] 4and cationic polymethine dye pinacyanol in aqueous solution has been investigated. Energetic characteristics and the structures of associates were determined and the influence of ionic surfactants on the associates has been considered.

Interaction of Dyes with Cationic Surfactants in Solutions: Determination of Critical Micelle Concentration

“…The association of the "dye -surfactant" type has a special interest due to certain features (the presence of spectral changes at sufficiently low concentrations of reagents at the level of 10 -6 M and even less). In general, association models and thermodynamics (association constants, enthalpy of formation and Gibbs energy) and other parameters (surface tension, the surface area per surfactant molecule at the water/air interface and others) were determined for different classes of dyes [9][10][11][12][13][14][15][16][17][18][19]. There are studies to find effective ways to extract some dyes from various media using surfactants [20][21][22][23].…”

Interaction of Dyes with Cationic Surfactants in Solutions: Determination of Critical Micelle Concentration

“…The association of the "dye -surfactant" type has a special interest due to certain features (the presence of spectral changes at sufficiently low concentrations of reagents at the level of 10 -6 M and even less). In general, association models and thermodynamics (association constants, enthalpy of formation and Gibbs energy) and other parameters (surface tension, the surface area per surfactant molecule at the water/air interface and others) were determined for different classes of dyes [9][10][11][12][13][14][15][16][17][18][19]. There are studies to find effective ways to extract some dyes from various media using surfactants [20][21][22][23].…”