5970-62-7Relevant articles and documents
Mechanosynthesis of multiferroic hybrid organic-inorganic [NH4][M(HCOO)3] M = Co2+,Mn2+,Zn2+,Ni2+, Cu2+ formate-based frameworks
Bersani, Danilo,Calestani, Davide,Cugini, Francesco,Gemmi, Mauro,Griesi, Andrea,Orlandi, Fabio,Righi, Lara,Solzi, Massimo,Vit, Valentina
supporting information, (2021/12/23)
The family of compounds with formula [NH4][M(HCOO)3], with M a divalent D-metal, is characterized by porous frameworks hosting NH4+ cations exhibiting at low temperature a spontaneous ferroelectric polarization. The presence of magnetically active divalent metal determines the occurrence of antiferromagnetic ordering below 30 K opening the avenue for a rational formulation of a new class of multiferroic materials. We demonstrate that this intriguing class of compounds can be synthetized with a mechanochemical approach. This novel route of synthesis was applied to the series [NH4][M(HCOO)3] with M= Cu2+, Co2+, Mn2+, Zn2+ and Ni2+ using as reactants ammonium formate and the corresponding di-hydrated metal formates. The milling duration of the process correlates with the thermal stability of the di-hydrated metal formates indicating that the first step of the mechanosynthesis process is represented by the removal of water molecules. The characterizations of the final products indicate the presence of single phase [NH4][M(HCOO)3] compounds with an excellent degree of crystallinity.
Synthesis and structure of quasi-one-dimensional zinc oxide doped with manganese
Gyrdasova,Krasil'nikov,Shalaeva,Kuznetsov,Tyutyunnik
, p. 72 - 78 (2012/05/07)
Nanotubes of manganese-doped zinc oxide Zn1 - xMnxO (0 ≤ x ≤ 0.2) were synthesized by heating the Zn1 - xMn x(HCOO)(OCH2CH2O)1/2 precursor in air at 500°C. The precursor with extended crystals was synthesized by a solvothermal method based on heat treatment of a mixture of Zn 1 - xMnx(HCOO)2 · 2H2O with an ethylene glycol excess at 100-130°C. The tubular morphology of Zn 1 - xMnxO particles was identi- fied by transmission electron microscopy. Tubular quasi-one-dimensional particles were shown to have a nanodispersed polycrystalline structure, the size of separate crystallites being from 5 to 20 nm. X-ray photo- electron spectroscopy suggested that the manganese distribution on the outer surface layer of Zn1 - xMn xO nanotubes is nonuniform. Pleiades Publishing, Ltd., 2012.
Solution synthesis and characterization of indium-zinc formate precursors for transparent conducting oxides
Pasquarelli, Robert M.,Curtis, Calvin J.,Miedaner, Alexander,Van Hest, Maikel F.A.M.,OHayre, Ryan P.,Ginley, David S.
, p. 5424 - 5431 (2010/08/05)
A series of In-Zn formate mixtures were investigated as potential precursors to amorphous In-Zn-oxide (IZO) for transparent conducting oxide (TCO) applications. These mixtures were prepared by neutralization from formic acid and characterized by elemental analysis, IR spectroscopy, powder X-ray diffraction, and thermogravimetry-differential scanning calorimetry (TG-DSC) measurements. Thermal analysis revealed that a mixture of In and Zn formates reduced the overall decomposition temperature compared to the individual constituents and that OH-substitution enhanced the effect. In terms of precursor feasibility, it was demonstrated that the decomposition products of In-Zn formate could be directed toward oxidation or reduction by controlling the decomposition atmosphere or with solution acid additives. For TCO applications, amorphous IZO films were prepared by ultrasonic spray deposition from In-Zn formate solutions with annealing at 300-400 °C.
