Alsowayigh, Marwah M.; Timco, Grigore A.; Borilovic, Ivana; Alanazi, Abdulaziz; Vitorica-yrezabal, Inigo J.; Whitehead, George F. S.; McNaughter, Paul D.; Tuna, Floriana; O’Brien, Paul; Winpenny, Richard E. P.; Lewis, David J.; Collison, David published the artcile< Heterometallic 3d-4f Complexes as Air-Stable Molecular Precursors in Low Temperature Syntheses of Stoichiometric Rare-Earth Orthoferrite Powders>, Application In Synthesis of 112-63-0, the main research area is heterometallic lanthanum gadolinium orthoferrite preparation crystal mol structure thermolysis.
Four 3d-4f heteropolymetallic complexes [Fe2Ln2((OCH2)3CR)2(O2CtBu)6(H2O)4] (where Ln = La (1 and 2) and Gd (3 and 4); and R = Me (1 and 3) and Et (2 and 4)) are synthesized and analyzed using elemental anal., Fourier transform IR spectroscopy (FT-IR), thermogravimetric anal. (TGA) and SQUID magnetometry. Crystal structures are obtained for both Me derivatives and show that the complexes are isostructural and adopt a defective dicubane topol. The four heavy metals are connected with two alkoxide bridges. These four precursors are used as single-source precursors to prepare rare-earth orthoferrite pervoskites of the form LnFeO3. Thermal decomposition in a ceramic boat in a tube furnace gives orthorhombic LnFeO3 powders using optimized temperatures and decomposition times: LaFeO3 formed at 650° over 30 min, whereas GdFeO3 formed at 750° over 18 h. These materials are structurally characterized using powder x-ray diffraction, Raman spectroscopy, SEM, energy-dispersive x-ray map spectroscopy, and SQUID magnetometry. EDX spectroscopy mapping reveals a homogeneous spatial distribution of elements for all four materials consistent with LnFeO3. Magnetic measurements on complexes 1-4 confirms the presence of weak antiferromagnetic coupling between the central Fe(III) ions of the clusters and negligible ferromagnetic interaction with peripheral Gd(III) ions in 3 and 4. Zero field cooled (ZFC) and field-cooled (FC) measurements of magnetization of LaFeO3 and GdFeO3 in the solid state suggests that both materials are ferromagnetic, and both materials show open magnetic hysteresis loops at 5 and 300 K, with Msat higher than previously reported for these as nanomaterials. We conclude that this is a new and facile low temperature route to these important magnetic materials that is potentially universal limited only by what metals can be programmed into the precursor complexes. Novel heterometallic 3d-4f complexes are reported, and their use as air stable mol. precursors for the synthesis of solid state rare earth orthoferrites (LnFeO3) is explored.
Inorganic Chemistry published new progress about Antiferromagnetic exchange. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Application In Synthesis of 112-63-0.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics