CN <sub>4</sub> H <sub>7</sub> B <sub>3</sub> O <sub>3</sub> F <sub>2</sub> (OH) <sub>2</sub> : short-wave UV hydroxyfluorooxyborate crystals with large birefringence
The synthesis of materials possessing substantial birefringence, particularly in the short-wave ultraviolet spectral range, continues to pose a significant challenge in optical materials science. This work reports the discovery of a new compound, CN<sub>4</sub>H<sub>7</sub>B<sub>3</sub>O<sub>3</sub>F<sub>2</sub>(OH)<sub>2</sub>, in the hydroxyfluorooxyborate category. It is synthesized by strategically selecting [CN<sub>4</sub>H<sub>7</sub>] groups with a wide HOMO-LUMO gap and substantial polarizability anisotropy as cations, while rationally modifying the B-O anionic groups through fluorination and hydroxylation. This compound exhibits a large birefringence value of Δ<i>n</i><sub>exp</sub> = 0.185 and a short UV absorption edge at 209 nm, making it a promising candidate for short-wave ultraviolet birefringent crystal materials.
Authors
- Chenhui Hu (ORCID: https://orcid.org/0009-0000-4184-5745)
- Chunjie Shen
- Shilie Pan (ORCID: https://orcid.org/0000-0003-4521-4507)
- Feng Zhang (ORCID: https://orcid.org/0000-0001-7420-0812)
- Huan Zhou (ORCID: https://orcid.org/0000-0002-4819-1956)
- Zhihua Yang (ORCID: https://orcid.org/0000-0001-9214-3612)
Institutions
- Xinjiang Technical Institute of Physics & Chemistry (CN)
- University of Chinese Academy of Sciences (CN)
Publication Details
- Journal
- Chemical Communications
- Published
- 2025-01-01
- DOI
- https://doi.org/10.1039/d5cc04333f
- Citations
- 1
- Primary Topic
- Crystal Structures and Properties
- Type
- article
- Field-Weighted Citation Impact
- 0.43