Stability of the infinite layer structure with iron square planar coordination.
Stability of the infinite layer structure with iron square planar coordination.
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DOI：
10.1021/ja800415d
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发表时间：
2008-03
影响因子：
15
通讯作者：
C. Tassel;Takashi Watanabe;Y. Tsujimoto;N. Hayashi;A. Kitada;Yuji Sumida;Takafumi D. Yamamoto;H. Kageyama;M. Takano;K. Yoshimura
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文献类型：
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作者：
C. Tassel;Takashi Watanabe;Y. Tsujimoto;N. Hayashi;A. Kitada;Yuji Sumida;Takafumi D. Yamamoto;H. Kageyama;M. Takano;K. Yoshimura
最近发现的SrFeO2通过软化学途径从前驱体SrFeO3制备，具有“无限层”（IL）结构和前所未有的FeO4方平面配位。我们表明，IL 结构具有显着的溶解度，可产生 Sr1-xCaxFeO2 (0 <or= x <or= 1)，并且具有热稳定性（SrFeO2 至少高达 1000 K）。这些结果表明，由于 Fe-O 键的极端共价性质，IL 结构一旦在低温下形成，就会具有惊人的鲁棒性，从而为性能的化学调节和可能的高温应用打开了大门。
The recently discovered SrFeO2 prepared by a soft chemical route from a precursor SrFeO3 has the "infinite layer" (IL) structure with an unprecedented FeO4 square-planar coordination. We show that the IL structure has significant solubility to yield Sr1-xCaxFeO2 (0 <or= x <or= 1) and is thermally stable (at least as high as 1000 K for SrFeO2). These results demonstrate that the IL structure, once it is formed at low temperatures, is surprisingly robust owing to the extremely covalent nature of the Fe-O bond, thereby opening a door to chemical tuning of properties and to possible high-temperature applications.