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Assembly and Characterization of Polyelectrolyte Complex Micelles
Published on: March 2, 2020
A study of interaction of cationic dyes with anionic polyelectrolytes
1Department of Chemistry, MITE, Moodabidri, India. nandinifalnir@yahoo.com
Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
|December 1, 2009
Summary
Pinacyanol chloride and Acridine Orange dyes interact with polymers Sodium Alginate and Heparin, inducing metachromasy. Pinacyanol chloride shows stronger metachromasy induction due to combined electrostatic and hydrophobic binding.
Area of Science:
- Spectroscopic analysis of polymer-dye interactions.
- Investigation of metachromasy in dye-polymer systems.
Background:
- Polymers like Sodium Alginate and Heparin can interact with dyes.
- Metachromasy, a color change, is observed in certain dye-polymer interactions.
Purpose of the Study:
- To investigate the interactions between Acridine Orange with Sodium Alginate and Pinacyanol Chloride with Heparin.
- To determine the nature of binding and thermodynamic parameters of these polymer-dye interactions.
- To study the effect of additives on metachromasy reversal.
Main Methods:
- Spectrophotometric analysis was employed to study dye-polymer interactions.
- Metachromasy was evidenced by blue shifts in absorption maxima.
- Interaction constants and thermodynamic parameters were determined.
- Reversal of metachromasy was studied using additives like alcohols, urea, and surfactants.
Main Results:
- Both polymer-dye pairs exhibited metachromasy, indicated by blue shifts.
- Acridine Orange-Sodium Alginate binding involved electrostatic forces.
- Pinacyanol Chloride-Heparin binding involved both electrostatic and hydrophobic forces.
- Reversal studies confirmed the involvement of both electrostatic and hydrophobic forces in binding.
Conclusions:
- Pinacyanol Chloride is more effective at inducing metachromasy than Acridine Orange.
- The binding mechanisms differ, with Pinacyanol Chloride exhibiting a more complex interaction.
- Understanding these interactions is crucial for applications involving dye-polymer systems.
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