Oxyfluoride Chemistry of Layered Perovskite Compounds

Applied Sciences

Yoshihiro Tsujimoto²  Kazunari Yamaura¹ 

[1] Superconducting Properties Unit, NIMS/Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan;;International Center for Young Scientists (ICYS), International Center for Materials Nanoarchitechtonics (WPI-MANA), National Institute for Materials Science (NIMS)/Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan

关键词: oxyfluoride;    layered perovskite;    high-pressure synthesis;    low-temperature fluorination;   

DOI  :  10.3390/app2010206

来源: mdpi

【 摘 要 】

In this paper, we review recent progress and new challenges in the area of oxyfluoride perovskite, especially layered systems including Ruddlesden-Popper (RP), Dion-Jacobson (DJ) and Aurivillius (AV) type perovskite families. It is difficult to synthesize oxyfluoride perovskite using a conventional solid-state reaction because of the high chemical stability of the simple fluoride starting materials. Nevertheless, persistent efforts made by solid-state chemists have led to a major breakthrough in stabilizing such a mixed anion system. In particular, it is known that layered perovskite compounds exhibit a rich variety of O/F site occupation according to the synthesis used. We also present the synthetic strategies to further extend RP type perovskite compounds, with particular reference to newly synthesized oxyfluorides, Sr₂CoO₃F and Sr₃Fe₂O_5+xF_2−x (x ~ 0.44).

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.