Li7SrScB12O24 and Li7Ba0.6Ca0.4ScB12O24: two new quaternary rare-earth borates with short UV cutoff edges

Jianbang Chen; Jie Zhang; Aixin Zhu; Xuchu Huang

doi:10.1039/D2NJ04448J

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Li₇SrScB₁₂O₂₄ and Li₇Ba_0.6Ca_0.4ScB₁₂O₂₄: two new quaternary rare-earth borates with short UV cutoff edges†

Jianbang Chen,^a Jie Zhang,^a Aixin Zhu^b and Xuchu Huang

*^a

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* Corresponding authors

^a College of Physics and Material Science, Changji University, Changji 931100, China
E-mail: hxuchu@163.com

^b College of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, Xinjiang 830054, China

Abstract

Two new quaternary rare-earth borates, Li₇M^IIScB₁₂O₂₄ (M^II = Sr, Ba_0.6Ca_0.4), crystallizing in the centrosymmetric space group R [3 with combining macron] were synthesized by a high-temperature solution method and characterized. They are isostructural and exhibit a three-dimensional anionic [ScB₁₂O₂₄]⁹⁻ framework composed of B₆O₁₄ groups and ScO₆ octahedra with alkali- and alkaline-earth metal cations occupying the cavities and keeping the charge balance. The UV-Vis-NIR diffuse reflectance spectrum shows that the cutoff edge of Li₇SrScB₁₂O₂₄ is less than 200 nm, which indicates its potential application in the deep UV region. Li₇M^IIScB₁₂O₂₄ (M^II = Sr, Ba_0.6Ca_0.4) will become a new type of rare-earth borates that have a deep-UV cutoff edge (≤200 nm). Furthermore, infrared spectroscopy and thermal analysis were carried out and the results were analyzed.

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Article information

DOI: https://doi.org/10.1039/D2NJ04448J
Article type: Communication
Submitted: 09 Sep 2022
Accepted: 22 Sep 2022
First published: 23 Sep 2022

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New J. Chem., 2022,46, 19629-19632

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Li₇SrScB₁₂O₂₄ and Li₇Ba_0.6Ca_0.4ScB₁₂O₂₄: two new quaternary rare-earth borates with short UV cutoff edges

J. Chen, J. Zhang, A. Zhu and X. Huang, New J. Chem., 2022, 46, 19629 DOI: 10.1039/D2NJ04448J

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