Huang Qingqing, Chen Dan, Li Feifan, Vieira Bruno J C, Waerenborgh João C, Cheng Xiedong, Pereira Laura C J, Li Yaping, Jin Yanling, Zhu Wenxuan, Lü Minfeng
School of Environmental & Chemical Engineering, Jiangsu University of Science and Technology, 212100 Zhenjiang, Jiangsu, China.
School of Materials Science and Engineering, Jiangsu University of Science and Technology, 212100 Zhenjiang, Jiangsu, China.
Inorg Chem. 2023 Aug 28;62(34):14044-14054. doi: 10.1021/acs.inorgchem.3c02076. Epub 2023 Aug 18.
Three mixed-valence barium iron fluorides, BaFeF, BaFeF, and BaFeF, were prepared through hydrothermal redox reactions. The characteristic structures of these compounds feature diverse distributions of FeF octahedra and FeF groups. BaFeF contained one-dimensional infinite [FeFeF] double chains, comprising corner-sharing octahedra along the direction; BaFeF contained one-dimensional [FeF] double chains, consisting of corner-sharing octahedra along the chain (-axis direction) and corner-sharing octahedra vertical to the chain, while BaFeF revealed three-dimensional (3D) frameworks that consist of isolated edge-sharing dinuclear FeF units linked via corners by FeF octahedra. Magnetization and Mössbauer spectroscopy measurements revealed that BaFeF exhibits an antiferromagnetic phase transition at ∼11 K, where ferrimagnetic [FeFeF] double chains are arranged in a paralleling manner, while BaFeF shows canted antiferromagnetic ordering at ∼32.5 K, leading to noncollinear spin ordering.
通过水热氧化还原反应制备了三种混合价态的钡铁氟化物，即BaFeF、BaFeF和BaFeF。这些化合物的特征结构具有不同分布的FeF八面体和FeF基团。BaFeF包含一维无限[FeFeF]双链，由沿方向共享角的八面体组成；BaFeF包含一维[FeF]双链，由沿链（-轴方向）共享角的八面体和垂直于链共享角的八面体组成，而BaFeF呈现出三维（3D）框架，该框架由通过FeF八面体的角连接的孤立边共享双核FeF单元组成。磁化和穆斯堡尔光谱测量表明，BaFeF在11 K处表现出反铁磁相变，其中亚铁磁[FeFeF]双链以平行方式排列，而BaFeF在32.5 K处表现出倾斜反铁磁有序，导致非共线自旋有序。
