Citation: Peng-Fei Li, Chun-Li Hu, Bo Zhang, Jiang-Gao Mao, Fang Kong. From HgGa₂(SeO₃)₄ to Hg₂Ga(SeO₃)₂F: The first Hg^Ⅰ-based selenite birefringent crystal triggered by linear groups and fluoride ions[J]. Chinese Chemical Letters, ;2026, 37(2): 110588. doi: 10.1016/j.cclet.2024.110588 shu

From HgGa₂(SeO₃)₄ to Hg₂Ga(SeO₃)₂F: The first Hg^Ⅰ-based selenite birefringent crystal triggered by linear groups and fluoride ions

Peng-Fei Li ^{a, b} ,
Chun-Li Hu ^{a, b} ,
Bo Zhang ^{a, b} ,
Jiang-Gao Mao ^{a, b} ,
Fang Kong ^{a, b, *,}

a.
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
b.
University of Chinese Academy of Sciences, Beijing 100049, China

kongfang@fjirsm.ac.cn

Received Date: 2 October 2024
Revised Date: 23 October 2024
Accepted Date: 29 October 2024
Available Online: 3 November 2024

Figures(5)

Exploring new material systems and enhancing the birefringence of compounds is a highly valuable endeavor. In this study, we introduce a novel method to enhance the birefringence of inorganic compounds by inducing structural alignment through linear groups and fluoride ions. We report on two new compounds: HgGa₂(SeO₃)₄ and Hg₂Ga(SeO₃)₂F. HgGa₂(SeO₃)₄ crystallizes in a non-centrosymmetric (NCS) space group, exhibiting a second harmonic generation (SHG) efficiency of approximately 60% that of commercial KH₂PO₄ (KDP), with a birefringence of 0.032@546 nm. Hg₂Ga(SeO₃)₂F, on the other hand, crystallizes in a centrosymmetric space (CS) group and represents the first reported Hg^Ⅰ-based selenite birefringent material. Due to the influence of the linear group Hg₂O₂, its birefringence is significantly enhanced to 0.111@546 nm, which is 3.5 times that of HgGa₂(SeO₃)₄. Moreover, both compounds demonstrate high stability and a broad optical transparency window. These findings indicate that Hg₂Ga(SeO₃)₂F is a promising candidate for birefringent material in the mid-infrared (MIR) range. Our research provides an innovative strategy for improving the birefringence of compounds.
- Optical properties,
- Crystal structures,
- Selenites,
- Birefringence,
- Nonlinear optical
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沈阳化工大学材料科学与工程学院沈阳 110142

From HgGa2(SeO3)4 to Hg2Ga(SeO3)2F: The first HgⅠ-based selenite birefringent crystal triggered by linear groups and fluoride ions

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通讯作者: 陈斌, bchen63@163.com

From HgGa₂(SeO₃)₄ to Hg₂Ga(SeO₃)₂F: The first Hg^Ⅰ-based selenite birefringent crystal triggered by linear groups and fluoride ions