Lan Yang, Luo Han, Wang Luli, Huang Ling, Cao Liling, Dong Xuehua, Zou Guohong
College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, P. R. China.
College of Chemistry, Sichuan University, Chengdu 610065, P. R. China.
Inorg Chem. 2024 Feb 5;63(5):2814-2820. doi: 10.1021/acs.inorgchem.3c04404. Epub 2024 Jan 24.
In the present work, we have successfully obtained two new UV antimony-based sulfates, NHSb(SO) and CaSbO(SO), by a conventional hydrothermal method. Interestingly, both compounds share similar structural building blocks, such as SbO seesaws and SO tetrahedra, yet they endow discrepant birefringence values measured at 546 nm with values of 0.150 and 0.114, respectively, owing to the different distortions of the SbO groups with SCALP electrons. Moreover, both compounds display large band gaps (4.32 and 4.43 eV, respectively), so they can be used as short-wavelength UV birefringent materials. Moreover, NHSb(SO) is a noncentrosymmetric compound, showing a frequency doubling effect of 0.2 × KDP. Detailed structural analyses and calculations confirm the source of superior optical performance and the reasons for the different birefringence of the two compounds. This work provides ideas for the following discovery of antimony-based optical materials with excellent properties.
在本工作中，我们通过传统水热法成功获得了两种新型的紫外锑基硫酸盐，即NHSb(SO)和CaSbO(SO)。有趣的是，这两种化合物具有相似的结构单元，如SbO跷跷板和SO四面体，但由于SbO基团与SCALP电子的不同畸变，它们在546 nm处测得的双折射值不同，分别为0.150和0.114。此外，这两种化合物都具有较大的带隙（分别为4.32和4.43 eV），因此它们可用作短波长紫外双折射材料。此外，NHSb(SO)是一种非中心对称化合物，其倍频效应为0.2×KDP。详细的结构分析和计算证实了优异光学性能的来源以及两种化合物双折射不同的原因。这项工作为后续发现具有优异性能的锑基光学材料提供了思路。
