Structure, surface topography and electrochemical properties of cast films formed by fullerenes and their compositions with salt matrices

Some properties of films based on fullerene and pyridyl substituted fullerenopyrrolidines were studied. Both direct casting and immobilizing electroactive substances in the tetraoctylammonium bromide (TOAB) or tetraphenylphosphonium bromide matrices were used for modification of the ITO electrode su...

Full description

Saved in:
Bibliographic Details
Published in:Synthetic metals 2007-10, Vol.157 (21), p.876-883
Main Authors: Goldshleger, N.F., Zolotarevsky, V.I., Kolesnikova, A.M., Ovsyannikova, E.V., Alpatova, N.M.
Format: Article
Language:English
Subjects:
Absorption spectra
Atomic force microscopy
Coating
Cyclic voltammetry
Fullerene
Pyridyl substituted fullerenopyrrolidines
Self-organization
Tetraoctylammonium bromide
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Some properties of films based on fullerene and pyridyl substituted fullerenopyrrolidines were studied. Both direct casting and immobilizing electroactive substances in the tetraoctylammonium bromide (TOAB) or tetraphenylphosphonium bromide matrices were used for modification of the ITO electrode surface. In accordance with X-ray diffraction, pyridyl substituted fullerenopyrrolidines are amorphous, and the lamellar structure of TOAB is retained when fullerene is present in the film. The differences, which are observed in the absorption spectra of the cast coatings of the individual fullerenes or fullerenes in the TOAB matrix as compared with solution spectra testify to the electronic interaction between fullerene molecules in a solid phase. At that, the quaternary ammonium salt participates immediately in the coating self-organization. Atomic force microscopy showed that both the solution composition and addends in the C 60 molecules influence the film morphology. Disintegration of fullerenes in the TOAB matrix and their interaction with hydrocarbon chains of TOAB provide the hydrophobic surrounding required for reversible electrochemical reduction of fullerene on an electrode in an aqueous solution. The differences observed for C 60 embedded in the tetraphenylphosphonium bromide and TOAB films accentuate the role of a layered structure of the matrix for the reversible electrochemical behavior of fullerene in aqueous solution.
ISSN:0379-6779
1879-3290
DOI:10.1016/j.synthmet.2007.08.019