Changeover during in Situ Compositional Modulation of Hexacyanoferrate (Prussian Blue) Material - Sorbonne Université Access content directly
Journal Articles Journal of the American Chemical Society Year : 2006

Changeover during in Situ Compositional Modulation of Hexacyanoferrate (Prussian Blue) Material

Abstract

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.

Dates and versions

hal-04171443 , version 1 (26-07-2023)

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Paulo Roberto Bueno, David Giménez-Romero, Claude Gabrielli, José Juan García-Jareño, Hubert Perrot, et al.. Changeover during in Situ Compositional Modulation of Hexacyanoferrate (Prussian Blue) Material. Journal of the American Chemical Society, 2006, 128 (51), pp.17146-17152. ⟨10.1021/ja066982a⟩. ⟨hal-04171443⟩
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