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Synthesis and decomposition of a novel carboxylate precursor to indium oxide

机译:新型氧化铟羧酸前体的合成与分解

摘要

Reaction of metallic indium with benzoyl peroxide in 4-1 methylpyridine (4-Mepy) at 25 C produces an eight-coordinate mononuclear indium(III) benzoate, In(eta(sup 2)-O2CC6H5)3(4-Mepy)2 4H2O (I), in yields of up to 60 percent. The indium(III) benzoate was fully characterized by elemental analysis, spectroscopy, and X-ray crystallography; (I) exists in the crystalline state as discrete eight-coordinate molecules; the coordination sphere around the central indium atom is best described as pseudo-square pyramidal. Thermogravimetric analysis of (I) and X-ray diffraction powder studies on the resulting pyrolysate demonstrate that this new benzoate is an inorganic precursor to indium oxide. Decomposition of (I) occurs first by loss of 4-methylpyridine ligands (100 deg-200 deg C), then loss of benzoates with formation of In2O3 at 450 C. We discuss both use of carboxylates as precursors and our approach to their preparation.
机译:金属铟与4-1甲基吡啶(4-Mepy)中的过氧化苯甲酰在25°C下反应生成八配位的单核苯甲酸铟(III),In(eta(sup 2)-O2CC6H5)3(4-Mepy)2 4H2O (I),产率高达60%。苯甲酸铟(III)通过元素分析,光谱学和X射线晶体学分析得到了充分表征。 (I)以离散的八坐标分子形式存在于结晶状态;最好将铟原子周围的配位球描述为伪正方形金字塔形。 (I)的热重分析和所得热解产物的X射线衍射粉研究表明,这种新的苯甲酸酯是氧化铟的无机前体。 (I)的分解首先通过丢失4-甲基吡啶配体(100℃-200℃)发生,然后通过苯甲酸酯的损失并在450°C形成In2O3来进行。我们讨论了羧酸盐作为前体的使用及其制备方法。

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