Influence of metal core of mixed‐metal carboxylates in preparation of spinel: ZnFe₂O(O₂CCF₃)₆ as a single‐source precursor for preparation of ZnFe₂O₄

Abstract

The mixed‐metal and mixed‐valance carboxylates of MFe2O(O2CCF3)6(C4H8O)2(H2O) (M = Zn, Mn, Cu) and MFe2O(O2CCCl3)6(C4H8O)2(H2O) (M = Zn, Fe) were utilized as potential precursors for the preparation of spinel. In the pyrolysis of ZnFe2O(O2CCF3)6(C4H8O)2(H2O) in air at 400 °C pure ZnFe2O4 is formed, in contrast to pyrolysis of the trichloro derivative, which resulted in the formation of ZnO and Fe2O3. In the pyrolysis of MnFe2O(O2CCF3)6(C4H8O)2(H2O) in nitrogen, MnFe2O4 was the main phase and single oxides were the minor phases. Copyright © 2005 John Wiley & Sons, Ltd.

Chemical Stabilization and Electrochemical Destabilization of the Iron Keggin Ion in Water

“…Aging of these acidified solutions for 1 d and 1 week (Figures S9 & S10) shows a trend toward more polydispersity and smaller species in all solutions except the three highest pH solutions. The trinuclear fragment of the Keggin ion is a likely decomposition product of acidified Kegg-1 , as it is well-known, particularly ligated by carboxylates. − We are uncertain of the fate of the Bi in the acidified solutions. However, no precipitate was ever observed, so it either remains bound to the iron species or is released into solution, likely in a mononuclear form, since the scattering intensity decreases rather than increases.…”

Chemistry of Doped Colloidal Nanocrystals

“…For multicomponent oxide systems, the most commonly used SSPs have been bimetallic alkoxides, carboxylate and βdiketonates. 70 5 , whose hydrolysis at 100 °C for 48 h in the presence of oleic acid and hydrogen peroxide generated 8 nm BaTiO 3 NCs. 86 The same authors obtained PbTiO 3 NCs starting from a Ti−Pb mixed isopropoxide.…”

“…SSPs have been widely employed to deposit semiconductor thin films by chemical vapor deposition (CVD) and to form films of complex bimetallic oxides by both solid-state and solution methods. − In the case of metal chalcogenide films, the use of properly designed SSPs offers, in addition to potential improvements in compositional control, the possibility of employing air-stable, nontoxic, easy to handle precursors much more suitable for material synthetic scale-up than are the traditional organometallic precursors, such as dimethylcadmium or diethylzinc. The same logic has motivated the use of SSPs in semiconductor NC synthesis.…”

“…For multicomponent oxide systems, the most commonly used SSPs have been bimetallic alkoxides, carboxylate and β-diketonates. ,− While a rich literature exists for mixed oxide thin films, only few examples have been reported of synthesizing mixed oxide NCs from SSPs. O’Brien et al used barium titanium ethyl hexane-isopropoxide, BaTi(O 2 CC 7 H 15 )[OCH(CH 3 ) 2 ] 5 , whose hydrolysis at 100 °C for 48 h in the presence of oleic acid and hydrogen peroxide generated 8 nm BaTiO 3 NCs .…”