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Alkaline earth metal zirconate perovskites MZrO3 (M = Ba2+, Sr2+, Ca2+) derived from molecular precursors and doped with Eu3+ ions.
Autorzy
Rok wydania
2016
Czasopismo
Numer woluminu
22
Strony
4780-4788
DOI
10.1002/chem.201504846
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
The effect of alkaline earth metal alkoxides on the protonation of zirconocene dichloride was investigated. This approach enabled the design of compounds with preset molecular structures for generating high-purity binary metal oxide perovskites MZrO3 (M=Ba2+, Sr2+, Ca2+). Single-source molecular precursors [Ba4Zr2(μ6-O)(μ3,η2-OR)8(OR)2(η2-HOR)2(HOR)2Cl4], [Sr4Zr2(μ6-O)(μ3,η2-OR)8(OR)2(HOR)4Cl4], [Ca4Zr2(μ6-O)(μ3,η2-OR)8(OR)2Cl4], and [Ca6Zr2(μ2,η2-OR)12(μ-Cl)2(η2-HOR)4Cl6]⋅8 CH2Cl2 were prepared via elimination of the cyclopentadienyl ring from Cp2ZrCl2 as CpH in the presence of M(OR)2 and alcohol ROH (ROH=CH3OCH2CH2OH) as a source of protons. The resulting complexes were characterized by elemental analysis, IR and NMR spectroscopy, and single-crystal X-ray diffraction. The compounds were then thermally decomposed to MCl2/MZrO3 mixtures. Leaching of MCl2 from the raw powder with deionized water produced highly pure perovskite-like oxide particles of 40-80 nm in size. Luminescence studies on Eu3+-doped MZrO3 revealed that the perovskites are attractive host lattices for potential applications in display technology.
Adres publiczny
http://dx.doi.org/10.1002/chem.201504846
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