Bueno, Paulo Roberto [UNESP]Gimenez-Romero, DavidGabrielli, ClaudeGarcia-Jareno, Jose JuanPerrot, HubertVicente, Francisco2014-05-202014-05-202006-12-27Journal of the American Chemical Society. Washington: Amer Chemical Soc, v. 128, n. 51, p. 17146-17152, 2006.0002-7863http://hdl.handle.net/11449/37420This 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.17146-17152engArtigo10.1021/ja066982aWOS:000242941600124Acesso restrito04770459067332540000-0003-2827-0208