Yang Mei, Liu Wenlong, Guo Sheng-Ping
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, P. R. China.
Inorg Chem. 2022 Sep 19;61(37):14517-14522. doi: 10.1021/acs.inorgchem.2c02765. Epub 2022 Sep 6.
Metal oxyhalides are attracting extensive interest for their enchanting structures and diverse properties. Herein, a ternary antimony oxyiodide, SbOI with the new hexagonal noncentrosymmetric 6 structure is systematically surveyed by focusing on its nonlinear-optical (NLO) behavior. Its two-dimensional structure is constructed by {Sb[SbO]} layers separated by charge-balanced I anions. The second-harmonic-generation measurement result suggests that SbOI is NLO-active, and the effect is assigned to the [SbO] triangular pyramids' contribution. SbOI shows a direct optical energy gap of 3.22 eV, which is the largest among all reported ternary oxyiodides. This work is the first investigation of ternary NLO Sb-based oxyhalides and enriches the study of metal oxyhalides as promising NLO materials.
金属卤氧化物因其迷人的结构和多样的性质而备受关注。在此，通过聚焦其非线性光学（NLO）行为，系统地研究了一种具有新型六方非中心对称6结构的三元碘化锑氧（SbOI）。其二维结构由被电荷平衡的碘阴离子分隔的{Sb[SbO]}层构成。二次谐波产生测量结果表明SbOI具有NLO活性，且该效应归因于[ SbO ]三角锥的贡献。SbOI显示出3.22 eV的直接光学能隙，这在所有已报道的三元碘氧化物中是最大的。这项工作是对基于锑的三元NLO卤氧化物的首次研究，并丰富了作为有前景的NLO材料的金属卤氧化物的研究。
