Please use this identifier to cite or link to this item:
Title: Electron-transfer studies in a lyotropic columnar hexagonal liquid crystalline medium
Authors: Kumar, Suresh P.
Lakshminarayanan, V.
Issue Date: 2007
Publisher: American Chemical Society
Citation: Langmuir, 2007, Vol. 23, p1548-1554
Abstract: We have studied the electron-transfer properties of some redox systems on a gold electrode in a lyotropic hexagonal columnar liquid crystalline phase (H1 phase) using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The liquid crystalline medium consists of the nonionic surfactant Triton X-100 and water. The redox reactions that have been studied are ferrocene/ferricenium, [Fe(CN)6]3-/4-, and [Ru(NH3)6]3+/2+. We have confirmed by polarizing optical microscopy that the liquid crystalline nature of the medium is maintained even after the addition of the redox species and the supporting electrolyte. The CV studies show a significant shift in the half-peak potentials of these redox reactions in the liquid crystalline medium. From the EIS studies, we have measured the diffusion coefficients and the kinetic parameters for the redox species. These results are discussed and compared with the values obtained in the conventional solvent medium. The CV and impedance studies demonstrate that the hexagonal columnar phase provides a novel controlled environment for the study of electron-transfer reactions in biological and physiological media.
Description: Restricted Access.
ISSN: 0743-7463
Alternative Location:
Copyright: 2007 American Chemical Society
Appears in Collections:Research Papers (SCM)

Files in This Item:
File Description SizeFormat 
2007 Langmuir V23 p1548.pdf
  Restricted Access
Restricted Access206.54 kBAdobe PDFView/Open Request a copy

Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.