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Xuehua Dong Ling Huang Cuifang Hu Hongmei Zeng Zhien Lin Xin Wang Kang Min Ok Guohong Zou 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2019,131(20):6598-6604
A novel noncentrosymmetric (NCS) polar fluoride sulfate, CsSbF2SO4, was obtained by ionothermal synthesis. A meticulously designed co‐substitution approach was used to successfully replace the [TiO6]8? and [PO4]3? functional groups in KTiOPO4 (KTP) with [SbO4F2]7? and [SO4]2? units, respectively. The structure of CsSbF2SO4 features a pseudo‐3D framework consisting of interconnected 1D [SbF2O2SO4]5? chains of corner‐sharing [SbO4F2]7? octahedra and [SO4]2? tetrahedra. The title compound exhibits a sharply enlarged band gap compared to its parent compound, KTP, benefitting from the introduction of F? ions and the displacement of Sb3+ cations. Second harmonic generation (SHG) measurements manifested that CsSbF2SO4 is phase‐matchable and revealed a strong SHG response of about 3.0 KH2PO4 (KDP), which is the highest value reported for any metal sulfate reported to date. The reported fluoride sulfate is a promising near ultraviolet (UV) nonlinear optical (NLO) material. 相似文献
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