Stepwise topochemical fluorination of SrCrO3 perovskite via a super-structured oxide

Yu Su; Yoshihiro Tsujimoto; Kotaro Fujii; Yuji Masubuchi; Hirohito Ohata; Hideo Iwai; Masatomo Yashima; Kazunari Yamaura

doi:10.1039/c9cc02512j

Stepwise topochemical fluorination of SrCrO₃ perovskite via a super-structured oxide

Chem Commun (Camb). 2019 Jun 25;55(50):7239-7242. doi: 10.1039/c9cc02512j. Epub 2019 Jun 5.

Authors

Yu Su¹, Yoshihiro Tsujimoto², Kotaro Fujii³, Yuji Masubuchi⁴, Hirohito Ohata⁵, Hideo Iwai⁵, Masatomo Yashima³, Kazunari Yamaura²

Affiliations

¹ Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan. TSUJIMOTO.Yoshihiro@nims.go.jp.
² Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan. TSUJIMOTO.Yoshihiro@nims.go.jp and Graduate School of Chemical Sciences and Engineering, Hokkaido University, North 13 West 8, Kita-ku, Sapporo 060-0808, Japan.
³ Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-W4-17, O-okayama, Meguro-ku, Tokyo 152-8551, Japan.
⁴ Faculty of Engineering, Hokkaido University, N13 W8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan.
⁵ Research Center for Advanced Measurement and Characterization, National Institute for Materials Science, Sengen, Tsukuba 305-0047, Japan.

PMID: 31165816
DOI: 10.1039/c9cc02512j

Abstract

A topochemical reaction between SrCrO₃ and polyvinylydene fluoride yields the new fluorinated phase SrCrO_2.8F_0.2. The transformation proceeds via a reduced oxide intermediate (SrCrO_2.8) that can be isolated as a single phase by the reaction between SrCrO₃ and g-C₃N₄. The fluoride ions randomly occupy anion sites despite an oxygen-vacancy ordered structure in SrCrO_2.8.