Zhang Nan, Xu Qian-Ting, Shi Zhi-Hui, Yang Mei, Guo Sheng-Ping
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, P. R. China.
Inorg Chem. 2022 Oct 31;61(43):17002-17006. doi: 10.1021/acs.inorgchem.2c03283. Epub 2022 Oct 20.
As one type of material containing multiple anions, oxysulfides can combine the advantages of oxides and sulfides and are deeply studied as nonlinear-optical (NLO) materials. Herein, a new melilite-type pentanary oxysulfide SrCoGeOS is studied. It crystallizes in the noncentrosymmetric tetragonal space group 4̅2, and its structure features GeOS and CoS tetrahedra-built {[CoGeOS]} layers. Its powder sample exhibits a moderate phase-matchable NLO response and a high laser-induced damage threshold. The NLO response is mainly determined by CoS tetrahedra according to the theoretical calculation results. This work indicates that transition-metal oxysulfides can also be considered as potential infrared NLO materials.
作为一种含有多种阴离子的材料，氧硫化物可以结合氧化物和硫化物的优点，并作为非线性光学（NLO）材料进行了深入研究。在此，研究了一种新型的镁黄长石型五元氧硫化物SrCoGeOS。它结晶于非中心对称的四方空间群4̅2，其结构特征是由GeOS和CoS四面体构建的{[CoGeOS]}层。其粉末样品表现出适度的相位匹配NLO响应和高激光诱导损伤阈值。根据理论计算结果，NLO响应主要由CoS四面体决定。这项工作表明，过渡金属氧硫化物也可被视为潜在的红外NLO材料。
