On the Low Stability of Molecular Magnets Based on Transition Metal Hexacyanochromates (III)
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E. Reguera
Abstract
In the research area of molecular magnets for Prussian blue analogues interesting and unusual effects have been observed, particularly for mixed transition metal salts of the hexacyanochromate (III) anion, TA3-xTBx[Cr(CN)6]2·yH2O. For single metal salts, T3[Cr(CN)6]2·yH2O, with T = Mn(2+), Fe(2+), Co(2+), three paramagnetic ions where long range magnetic order is observed, the materials show low stability. The structural change can be envisaged as a flipping of the CN ligand, from T-N≡C-Cr-C≡N-T to Cr-N≡C-T-C≡N-Cr. The material containing these metals (Mn, Fe, Co) could be partially stabilized by the incorporation of a second metal that does not form stable hexacyano complexes (Ni, Cu, Zn, Cd). In this contribution such possibility is explored. The role of the porous framework in the material low stability is also discussed. For analog compact solids, TCs[Cr(CN)6], a relatively high stability on aging was observed. The study of the mixed compositions is preceded by a structural characterization of the simple series where the effect of the crystal water removal is also considered.
© by Oldenbourg Wissenschaftsverlag, München, Germany
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Artikel in diesem Heft
- On the Low Stability of Molecular Magnets Based on Transition Metal Hexacyanochromates (III)
- Conductivity Study of Some Thiocyanate Salts in Aqueous Binary Mixtures of Tetrahydrofuran and 1,3-Dioxolane at 298.15 K
- Preparation of Visible-Light-Responsive Nitrogen-carbon Co-doped Titania by Chemical Vapor Deposition
- Enhanced Performance in Vapor O-Methylation of Hydroxybenzene Over a Noval Kind of Mesoporous Rare Earth Phosphate
- Kinetic and Mechanistic Aspects of Osmium(VIII) Catalyzed Oxidation of DL-ornithine by Copper(III) Periodate Complex in Aqueous Alkaline Medium
- Estimation of Lacking Standard Thermodynamic Data of Peroxodisulfates at 0–50 °C
- On the Interaction of Ionic Liquid 1-Butyl-3-Methylimidazolium Hexafluorophosphate with β-Cyclodextrin in Aqueous Solutions
- Effect of the Addition of In to Co/HMCM-49 Catalyst for the Selective Catalytic Reduction of NO Under Lean-burn Conditions
- Is the Oxygen Radical Absorbance Capacity (ORAC) Method a Peroxyl-radical Scavenging Assay?
- Ostwald´s Rule and the Principle of the Shortest Way
