16648-22-9Relevant academic research and scientific papers
Ready Access to Anhydrous Anionic Lanthanide Acetates by Using Imidazolium Acetate Ionic Liquids as the Reaction Medium
Bousrez, Guillaume,Renier, Olivier,Kelley, Steven P.,Adranno, Brando,Tahavori, Elnaz,Titi, Hatem M.,Smetana, Volodymyr,Tang, Si-Fu,Mudring, Anja-Verena,Rogers, Robin D.
, p. 13181 - 13189 (2021/08/16)
Access to lanthanide acetate coordination compounds is challenged by the tendency of lanthanides to coordinate water and the plethora of acetate coordination modes. A straightforward, reproducible synthetic procedure by treating lanthanide chloride hydrates with defined ratios of the ionic liquid (IL) 1-ethyl-3-methylimidazolium acetate ([C2mim][OAc]) has been developed. This reaction pathway leads to two isostructural crystalline anhydrous coordination complexes, the polymeric [C2mim]n[{Ln2(OAc)7}n] and the dimeric [C2mim]2[Ln2(OAc)8], based on the ion size and the ratio of IL used. A reaction with an IL : Ln-salt ratio of 5 : 1, where Ln=Nd, Sm, and Gd, led exclusively to the polymer, whilst for the heaviest lanthanides (Dy?Lu) the dimer was observed. Reaction with Eu and Tb resulted in a mixture of both polymeric and dimeric forms. When the amount of IL and/or the size of the cation was increased, the reaction led to only the dimeric compound for all the lanthanide series. Crystallographic analyses of the resulting salts revealed three different types of metal-acetate coordination modes where η2μκ2 is the most represented in both structure types.
Microwave-assisted synthesis and characterization of ultrafine neodymium oxide particles
Zawadzki, Miros?aw
, p. 297 - 300 (2008/10/09)
Nanocrystalline neodymium oxide precursor particles have been prepared for the first time by a microwave-assisted hydrothermal route from a solution containing Nd(CH3COO)3·H2O. Further thermal treatment of the as-prepared precursors resulted in the formation of the well-crystallized Nd2O3 (cubic or trigonal) nanoparticles with fibrous or rod-like morphology. It was found that neodymium oxide is mesoporous material owning the specific surface area up to 130 m2/g. The proposed synthesis, in contrast to conventional hydrothermal method, offers very rapid heating with better yield and high reproducibility.
Electronic absorption spectroscopy of neodymium acetate single crystals
Mondry, Anna,Bukietynska, Krystyna
, p. 818 - 821 (2008/10/08)
Electronic absorption spectra of neodymium acetate single crystals were measured at 293 and 4 K. The intensities of 4f-4f transitions were calculated and the Judd-Ofelt Ωλ parameters evaluated. These results differ in comparison with other lant
