Substituent and environment influence on analytical properties of associates of xanthene dyes with polyhexamethyleneguanidine chloride
The interaction of 5 anionic xanthene dyes – 9-R-2,3,7-trihydroxy-6-fluorones (ТОF) with cationic polyelectrolyte (PE) – polyhexamethyleneguanidine chloride (PHMG) has been studied by the optical spectroscopy in a concentration range where PHMG has a polyelectrolyte effect. Hammet σ-constants were calculated. The correlations between structure of ТОF and shift of protolytic equilibrium in aqueous-polyelectrolyte solutions were established. Influence of рН, concentration of the ethanol, components ratio in the system PHMG-TOF on the character of the interaction of cationic PE with ТОF and value of the analytical signal were studied based on absorption spectra. The results were compared to those obtained in water solutions.
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