Cobalt titanate-cobalt oxide composite thin films deposited from heterobimetallic precursor
Cobalt titanate-cobalt oxide composite thin films deposited from heterobimetallic precursor
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DOI：
10.1002/aoc.2893
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发表时间：
2012-09-01
影响因子：
3.9
通讯作者：
Wijayantha, K. G. Upul
中科院分区：
文献类型：
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作者：
Ehsan, Muhammad Ali;Mansoor, Muhammad Adil;Wijayantha, K. G. Upul
合成了单分子异双金属配合物[Co2Ti(mu3-O)(TFA)6(THF)3](1)[TFA=三氟乙酸酯，THF=四氢呋喃]，对其结构和光谱进行了表征，并将其作为气溶胶辅助化学气相沉积(AACVD)制备CoTiO3CoO复合薄膜的单一来源前驱体.在三氟乙酸存在下，Co(OAc)2.4H2O[OAc？=？(CH3COO-)]与异丙醇钛反应合成了前驱体配合物，并对其进行了熔点、CHN、FT-IR、单晶X-射线衍射和热重分析。前驱体络合物在480℃下热分解，得到与CoTiO3CoO复合材料相对应的残余质量。在500℃下用AACVD法制备了高质量的CoTiO3CoO复合薄膜，并通过粉末X射线衍射和扫描电子显微镜/能量色散X射线能谱对其进行了表征，结果表明所制备的CoTiO3CoO复合薄膜具有玫瑰花状的形貌，平均花瓣尺寸为26微米。
A single molecular heterobimetallic complex, [Co2Ti(mu 3-O)(TFA)6(THF)3] (1) [TFA?=?trifluoroacetate, THF?=?tetrahydrofuran], was synthesized, structurally and spectroscopically characterized and implemented as a single-source precursor for the preparation of CoTiO3CoO composite thin films by aerosol-assisted chemical vapour deposition (AACVD). The precursor complex was prepared by interaction of Co(OAc)2.4H2O [OAc?=?(CH3COO-)] with Ti(iso-propoxide)4 in the presence of trifluoroacetic acid in THF, and was analysed by melting point, CHN, FT-IR, single-crystal X-ray diffraction and thermogravimetric analysis. The precursor complex thermally decomposed at 480 degrees C to give a residual mass corresponding to a CoTiO3CoO composite material. Good-quality crystalline CoTiO3CoO composite thin films deposited at 500 degrees C by AACVD and characterized through powder X-ray diffraction and scanning electron microscopy/energy-dispersive X-ray spectroscopy show that the crystallites have a rose-flower-like morphology with an average petal size in the range of 26 mu m. Copyright (C) 2012 John Wiley & Sons, Ltd.