Repozytorium
Wyszukaj
Kolekcje
Inne
Heterometallic group 4–lanthanide oxo-alkoxide precursors for synthesis of binary oxide nanomaterials.
Autorzy
Rok wydania
2020
Czasopismo
Numer woluminu
59
Strony
16545-16556
DOI
10.1021/acs.inorgchem.0c02478
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
In this study, an efficient procedure for the synthesis of uncommon group 4–lanthanide oxo-alkoxide derivatives was developed. Heterometallic clusters with the structures [La2Ti4(μ4-O)2(μ3-OEt)2(μ-OEt)8(OEt)6(Cl)2(HOEt)2] (1), [La2Zr2(μ3-O)(μ-OEt)5(μ-Cl)(OEt)2(HOEt)4(Cl)4]n (2), [La2Hf2(μ3-O)(μ-OEt)5(μ-Cl)(OEt)2(HOEt)4(Cl)4]n (3), [Nd2Ti4(μ4-O)2(μ3-OEt)2(μ-OEt)8(OEt)6(HOEt)2(Cl)2] (4), [Nd4Zr4(μ3-O)2(μ-OEt)10(μ-Cl)4(OEt)8(HOEt)10(Cl)2] (5), and [Nd4Hf4(μ3-O)2(μ-OEt)10(μ-Cl)4(OEt)8(HOEt)10(Cl)2] (6) were synthesized via the reaction of a metallocene dichloride, Cp2M′Cl2 (where M′ = Ti, Zr, and Hf), and metallic lanthanum or neodymium in the presence of excess ethanol. This procedure gave crystalline precursors with molecular stoichiometries suitable for obtaining group 4–lanthanide oxide materials. Compounds 1–6 were examined by analytical and spectroscopic techniques and single-crystal X-ray diffraction. The magnetic properties of 5 and 6 were investigated by using direct and alternating current (dc and ac) susceptibility measurements. The results indicated weak antiferromagnetic interactions between NdIII ions and a field-supported slow magnetic relaxation. Lanthanum–titanium compound 1 decomposed at 950 °C to give the perovskite compound La0.66TiO3 and small amounts of rutile TiO2. Under the same conditions, 4 decomposed to give a mixture of Nd4Ti9O24 and Nd0.66TiO3. When 4 was calcined at 1300 °C, decomposition of Nd4Ti9O24 to Nd0.66TiO3 and TiO2 was observed. Calcination of 2, 3, 5, and 6 at 950–1500 °C led to the selective formation of heterometallic La2Zr2O7, La2Hf2O7, Nd2Zr2O7, and Nd2Hf2O7 phases, respectively.
Słowa kluczowe
Physical and chemical processes, Oxides, Mathematical methods, Materials, Ions
Adres publiczny
http://dx.doi.org/10.1021/acs.inorgchem.0c02478
Strona internetowa wydawcy
Podobne publikacje
Convenient route to heterometallic group 4–zinc precursors for binary oxide nanomaterials.
Petrus Rafał, Chomiak Katarzyna, Utko Józef, Wilk-Kozubek Magdalena, Lis Tadeusz, Cybińska Joanna, Sobota Piotr
Heterometallic 3d–4f Alkoxide Precursors for the Synthesis of Binary Oxide Nanomaterials
Petrus Rafał, Kowaliński Adrian, Utko Józef, Matuszak Karolina, Lis Tadeusz, Sobota Piotr
Unravelling the behavior of Dion–Jacobson layered hybrid perovskites in humid environments.
Dučinskas Algirdas, Kim Gee Yeong, Moia Davide, Senocrate Alessandro, Wang Ya-Ru, Hope Michael A., Mishra Aditya, Kubicki Dominik J., Siczek Miłosz, Bury Wojciech, Schneeberger Thomas, Emsley Lyndon, Milić Jovana V., Maier Joachim, Grätzel Michael