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Comparative electrochemistry of phenothiazine dyes incorporated into Nafion and poly(styrenesulfonate) films

Authors
  • John, S Abraham1
  • Ramaraj, R1
  • 1 Madurai Kamaraj University, School of Chemistry, Madurai, 625 021, India , Madurai
Type
Published Article
Journal
Proceedings of the Indian Academy of Sciences - Chemical Sciences
Publisher
Springer India
Publication Date
Apr 01, 1998
Volume
110
Issue
2
Pages
115–126
Identifiers
DOI: 10.1007/BF02871148
Source
Springer Nature
Keywords
License
Yellow

Abstract

The electrochemical properties of phenothiazine dyes, thionine (TH+) and methylene blue (MB+), incorporated into Nafion and PSS films were studied. These dyes showed different electrochemical behaviour in Nafion film when compared to aqueous solution and PSS film. The observed electrochemical behaviour has been explained by the interaction of reduced TH+ and MB+ molecules with different regions of the Nafion film. In the PSS film, the incorporated dye molecules experienced purely a hydrophilic environment and showed electrochemical properties similar to that of aqueous solution. Further, the interaction of the reduced MB+ molecules with the hydrophobic fluorocarbon region of the Nafion film was studied by spectroelectrochemistry adding 2-propanol to the supporting electrolyte solution.

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