Highly Birefringent d0 Transition Metal Fluoroantimonite in the Mid Infrared Band: Order-Disorder Regulation by Cationic Size

Jia-Hang Wu; Chun-Li Hu; Ting-Kun Jiang; Jiang-Gao Mao; Fang Kong

doi:10.1021/jacs.3c09566

Highly Birefringent d⁰ Transition Metal Fluoroantimonite in the Mid Infrared Band: Order-Disorder Regulation by Cationic Size

J Am Chem Soc. 2023 Nov 8;145(44):24416-24424. doi: 10.1021/jacs.3c09566. Epub 2023 Oct 26.

Authors

Jia-Hang Wu^{1

2}, Chun-Li Hu^{1

3}, Ting-Kun Jiang^{1

2}, Jiang-Gao Mao^{1

3}, Fang Kong^{1

3}

Affiliations

¹ State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, People's Republic of China.
² College of Chemistry, Fuzhou University, Fuzhou 350108, People's Republic of China.
³ University of Chinese Academy of Sciences, Beijing 100039, People's Republic of China.

PMID: 37881867
DOI: 10.1021/jacs.3c09566

Abstract

An unusual O/F ordered d⁰ transition metal fluoroantimonite, namely, K₂SbMoO₂F₇, has been created by the cationic size effect of alkali metals. It features the largest birefringence of 0.220@550 nm among inorganic antimonites with a halogen element, which is an order of magnitude larger than the disordered A₂SbMoO₂F₇ (A = Rb, Cs). These three new compounds exhibit two different structures, although all of the structures were made of [SbMoO₂F₇]^2- chains formed by SbF₅ square pyramids and MoO₂F₄ octahedrons. A transparent single crystal of K₂SbMoO₂F₇ with dimensions of 7.0 × 5.0 × 1.0 mm³ has been successfully grown by the aqueous solution volatilization method. The UV-vis-MIR transmission spectrum showed that K₂SbMoO₂F₇ can display excellent transmittance in the range of 0.5-5.0 μm and 6.0-9.8 μm, indicating its application potential as a birefringent material in the mid infrared band. This work offers a fresh approach to the design and synthesis of mid infrared birefringent materials.