Hao Xia, Lin Chensheng, Luo Min, Ye Ning
School of Materials Science and Engineering, Henan Normal University, Xinxiang 453007, P. R. China.
Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.
Inorg Chem. 2023 Nov 6;62(44):18020-18024. doi: 10.1021/acs.inorgchem.3c03172. Epub 2023 Oct 20.
Second-harmonic generation (SHG) response and birefringence stand as fundamental optical properties for nonlinear optical (NLO) materials. Up to now, engineering a strong SHG response and substantial birefringence in the sulfamate system has proven to be exceedingly challenging. A novel noncentrosymmetric compound, Sr(NHSO)(NO)·HO, has been meticulously designed by introducing the (NO) group characterized by significant polarizability anisotropy and hyperpolarizability into the polar non-π-conjugated (NHSO) system. This compound exhibits a robust SHG response (5.2 × KDP), ample birefringence (0.077 at 546.1 nm), and a short ultraviolet (UV) absorption edge (290 nm). The linear and nonlinear optical properties can be attributed to the (NO) group and the (NHSO) group. This study presents an effective approach that contributes to the design of more composite anionic UV NLO materials with excellent and balanced optical properties.
二次谐波产生（SHG）响应和双折射是非线性光学（NLO）材料的基本光学性质。到目前为止，在氨基磺酸盐体系中设计出强SHG响应和显著双折射已被证明极具挑战性。通过将具有显著极化率各向异性和超极化率的（NO）基团引入极性非π共轭（NHSO）体系，精心设计了一种新型非中心对称化合物Sr(NHSO)(NO)·HO。该化合物表现出强烈的SHG响应（5.2×KDP）、充足的双折射（在546.1nm处为0.077）和短紫外（UV）吸收边（290nm）。线性和非线性光学性质可归因于（NO）基团和（NHSO）基团。本研究提出了一种有效的方法，有助于设计出更多具有优异且平衡光学性质的复合阴离子紫外NLO材料。
