Synthesis and Characterization of Mixed-Metal Aryloxo-Organometallic Precursors for Oxide−Ceramic Materials

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• 作者：Ł ; ukasz John ; Jo&#x301 ; zef Utko ; Sł ; awomir Szafert ; Lucjan B. Jerzykiewicz ; Leszek Kȩ ; pin&#x301 ; ski ; Piotr Sobota
• 刊名：Chemistry of Materials
• 出版年：2008
• 出版时间：July 8, 2008
• 年：2008
• 卷：20
• 期：13
• 页码：4231 - 4239
• 全文大小：2221K
• 年卷期：v.20,no.13(July 8, 2008)
• ISSN：1520-5002

文摘

Potential single-source molecular precursors [Ba{(µ-ddbfo)₂MR_x}₂] (ddbfoH = 2,3-dihydro-2,2-dimethylbenzofuran-7-ol; M/R/x = Al/Me/2, Al/Et/2, Ga/Me/2, or Zn/Et/1) for mixed metal oxide materials were prepared by the reaction of barium aryloxide [Ba(ddbfo)₂(ddbfoH)₂]·3ddbfoH with an appropriate organometallic compound in toluene. The precursors were characterized by elemental analysis, IR and NMR spectroscopy, and single-crystal X-ray structural analysis. The Ba/Al₂ and Ba/Ga₂ complexes undergo thermal decomposition to give mixed metal oxides BaM₂O₄ (M = Al, at 1300 °C for both Me and Et derivatives; Ga, at 1430 °C). Instead, the Ba/Zn₂ complex decomposes to a mixture of BaCO₃ and different metal oxides. The chemical composition and surface morphology of heterobimetallic oxides were analyzed by SEM-EDS and X-ray powder diffraction (XRD) that revealed the formation of highly pure oxide materials with micrometer particle sizes.