K<sub>2</sub>SO<sub>4</sub>(NH<sub>3</sub>SO<sub>3</sub>)<sub>2</sub> and Cs<sub>2</sub>SO<sub>4</sub>(NH<sub>3</sub>SO<sub>3</sub>)<sub>3</sub>: two deep-UV transparent sulfamate-sulfates with moderate birefringence
In this work, polar tetrahedral [NH<sub>3</sub>SO<sub>3</sub>] and non-polar tetrahedral [SO<sub>4</sub>]<sup>2-</sup> groups were combined to synthesize two deep-UV transparent crystals K<sub>2</sub>SO<sub>4</sub>(NH<sub>3</sub>SO<sub>3</sub>)<sub>2</sub> and Cs<sub>2</sub>SO<sub>4</sub>(NH<sub>3</sub>SO<sub>3</sub>)<sub>3</sub> based on the solution evaporation method. Due to the presence of two types of tetrahedral groups with wide bandgap and alkali metal cations without d-d or f-f transitions, both crystals exhibit a deep-UV cutoff edge, approximately 190 nm. Significantly, the birefringence values of K<sub>2</sub>SO<sub>4</sub>(NH<sub>3</sub>SO<sub>3</sub>)<sub>2</sub> and Cs<sub>2</sub>SO<sub>4</sub>(NH<sub>3</sub>SO<sub>3</sub>)<sub>3</sub> are 0.0123 and 0.0153 @546 nm, respectively, which are remarkably improved compared to those of many conventional sulfate crystals. In addition, theoretical calculations were performed to analyze the relationships between the structures and optical properties.
Authors
- Yuchen Yan
- Guang Peng (ORCID: https://orcid.org/0000-0002-2092-8020)
- Jindong Chen (ORCID: https://orcid.org/0000-0002-3940-9968)
- Xin Wen (ORCID: https://orcid.org/0009-0000-1022-3396)
- Huili Zhang (ORCID: https://orcid.org/0000-0001-8824-5341)
- Guangsai Yang (ORCID: https://orcid.org/0000-0001-8904-4576)
- Ning Ye (ORCID: https://orcid.org/0000-0002-3679-4047)
- Yun Ji
Institutions
- Tianjin University of Technology (CN)
- Shandong University (CN)
- State Key Laboratory of Crystal Materials
Publication Details
- Journal
- Dalton Transactions
- Published
- 2025-01-01
- DOI
- https://doi.org/10.1039/d5dt00401b
- Citations
- 1
- Primary Topic
- Solid-state spectroscopy and crystallography
- Type
- article
- Field-Weighted Citation Impact
- 0.52