Regulation of Refractive Index by Halogens in Two-Dimensional Layered Methylsulfonate Halides
Herein, a series of unprecedented alkaline earth metal methylsulfonate halides, M(SO<sub>3</sub>CH<sub>3</sub>)X·<i>n</i>H<sub>2</sub>O (M = Sr, Ba; X = Cl, Br, I; <i>n</i> = 2, 4), and Ba<sub>2</sub>(SO<sub>3</sub>CH<sub>3</sub>)<sub>3</sub>I·4H<sub>2</sub>O were synthesized. They all feature two-dimensional (2D) layered structures with halogen elements inserted between the 2D layers constructed by metal ions and [SO<sub>3</sub>CH<sub>3</sub>] groups, which are suitable for exploring the influence of halogens on their refractive index. The refractive indexes both parallel and (almost) perpendicular to the 2D layers were calculated through theoretical calculations. We found that the nonpolar halogens exhibited different enhancement in the two directions. The result may guide regulating the birefringence properties of such 2D crystal materials. Besides, the ultraviolet (UV) cutoff edge of Sr(SO<sub>3</sub>CH<sub>3</sub>)Cl·4H<sub>2</sub>O and Ba(SO<sub>3</sub>CH<sub>3</sub>)Cl·4H<sub>2</sub>O can reach 183 and 184 nm, respectively, indicating their potential application in the deep-UV region.
Authors
- Piao Tang
- 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/0000-0003-1937-1875)
- Cao Xue
- Ning Ye (ORCID: https://orcid.org/0000-0002-3679-4047)
- Xuemei Shi
Institutions
- Fujian Normal University (CN)
- Tianjin University of Technology (CN)
- Shandong University (CN)
- Crystal Research (United States) (US)
- State Key Laboratory of Crystal Materials
Publication Details
- Journal
- Inorganic Chemistry
- Published
- 2025-03-06
- DOI
- https://doi.org/10.1021/acs.inorgchem.5c00476
- Citations
- 6
- Primary Topic
- Crystal Structures and Properties
- Type
- article
- Field-Weighted Citation Impact
- 2.56
Funders
- National Natural Science Foundation of China
- Natural Science Foundation of Tianjin City
- National Key Research and Development Program of China