Changeover during in situ compositional modulation of hexacyanoferrate (Prussian Blue) material
Nenhuma Miniatura disponível
Data
2006-12-27
Autores
Bueno, Paulo Roberto [UNESP]
Gimenez-Romero, David
Gabrielli, Claude
Garcia-Jareno, Jose Juan
Perrot, Hubert
Vicente, Francisco
Título da Revista
ISSN da Revista
Título de Volume
Editor
Amer Chemical Soc
Resumo
This paper describes the importance of (H2O)(6) clusters in controlling the properties of hexacyanoferrate (Prussian Blue) materials. A careful in situ study of compositional changes by using electrogravimetric techniques (in ac and dc modes) in hexacyanoferrates containing K+ alkali metals reveals the existence of a changeover in the properties of these films in a narrow potential range. Control of the compositional variation of the changeover is dependent on the K+ stoichiometric number in the compound structure. However, a specific K+ occupation in the compound structure activates the occupation of the (H2O)(6) cluster by H3O+ and/or H+, causing the changeover in the properties of hexacyanoferrate film. Thus, the information thus obtained is very useful for understanding the mechanisms involved in the electrochemical reversible switch between ferrimagnetism/paramagnetism, semiconductor/metal and electroluminescence/nonelectroluminescence properties of molecular cyanide materials.
Descrição
Palavras-chave
Como citar
Journal of the American Chemical Society. Washington: Amer Chemical Soc, v. 128, n. 51, p. 17146-17152, 2006.