Voltammetric studies in selected aqueous and non-aqueous media were conducted for a series of silane-modified SnO2 electrodes which had been further modified with a variety of metal phthalocyanines and metal cations. It is shown that tetrasulfonated, transitionmetal phthalocyanines can be both adsorbed and covalently attached to silane-modified surfaces where the silane has a coordinating ligand functionality such as a primary or secondary amine. It is further shown that the presence of the silane on the SnO2surface causes the appearance of a reversible voltammetric process following exposure of the surface to solution cation species. This reversible voltammetric wave is hypothesized to be due to the reduction of a surface bound Sn(IV) species to Sn(II) in a strongly hydroxylated environment.
|Original language||English (US)|
|Number of pages||13|
|Journal||Journal of Electroanalytical Chemistry|
|Publication status||Published - Dec 23 1980|
ASJC Scopus subject areas
- Analytical Chemistry
- Chemical Engineering(all)