Low-temperature solvothermal fluorination method and synthesis of La4Ni3O8F oxyfluorides via the La4Ni3O8 infinite-layer intermediate
Low-temperature solvothermal fluorination method and synthesis of La4Ni3O8F oxyfluorides via the La4Ni3O8 infinite-layer intermediate
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DOI：
10.1016/j.jssc.2020.121490
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发表时间：
2020-09
影响因子：
3.3
通讯作者：
Colin K. Blakely;S. R. Bruno;S. Kraemer;A. Abakumov;V. Poltavets
中科院分区：
文献类型：
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作者：
Colin K. Blakely;S. R. Bruno;S. Kraemer;A. Abakumov;V. Poltavets
发展了一种新的溶剂热还原法，通过填充母体结构中的阴离子空位制备亚稳氟氧化物。XeF2在乙腈中的高溶解度和溶剂的极性允许较低的反应温度。该方法的有效性通过在前所未有的低温（100 °C）下制备已知的氟氧化物SrCoO2.5F0.5来证明。此外，通过溶剂热法制备了La4Ni3O8F1和La4Ni3O8F2两种新型氟氧化物。所提出的方法允许制备亚稳态氟氧化物，仅利用廉价的商业高压釜，并可能在材料合成中得到广泛的应用。
A novel facile solvothermal fluorination method was developed for metastable oxyfluorides preparation by filling anion vacancies in parent structures. High solubility of XeF2in acetonitrile and polarity of the solvent allowed for lower reaction temperature. The validity of the method was demonstrated by the preparation of a known oxyfluoride, SrCoO2.5F0.5, at unprecedented low temperature (100 °C). Additionally, two new oxyfluorides with idealized stoichiometry of La4Ni3O8F1and La4Ni3O8F2, were prepared by the solvothermal fluorination via the La4Ni3O8infinite-layer intermediate. The proposed method allows preparation of metastable oxyfluorides, utilizes only inexpensive commercial autoclaves and can potentially find widespread utilization in materials synthesis.