一种具有三种不同配位阴离子且具有强二次谐波产生响应的铅混合卤化物。
A Lead Mixed Halide with Three Different Coordinated Anions and Strong Second-Harmonic Generation Response.
作者信息
Shui Qi-Rui, Fu Rui-Biao, Zhou Zi-Qi, Ma Zu-Ju, Tang Hong-Xin, Wu Xin-Tao
机构信息
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China.
Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian, 350108, P. R. China.
出版信息
Chemistry. 2022 Jan 19;28(4):e202103687. doi: 10.1002/chem.202103687. Epub 2021 Nov 5.
Nonlinear optical (NLO) crystals are widely applied in information technology, micro-manufacturing and medical treatment. Herein, a new lead mixed halide with strong second-harmonic generation (SHG) response, Cs Pb (CH COO) Br I , has been designed and rationally synthesized. Cs Pb (CH COO) Br I represents the rare NLO crystal featuring that three different anions (I , Br and O ) simultaneously coordinate the Pb(II) atom to form a severely distorted [PbBr I O ] polyhedron with a large polarizability. Remarkably, Cs Pb (CH COO) Br I not only exhibits a very strong phase-matching SHG response of 9×KH PO (KDP), but also possesses a large birefringence (0.27@1064 nm) and high laser damage threshold (LDT). The strong SHG effect of Cs Pb (CH COO) Br I mainly originates from the oriented arrangement of [Pb Br I ] chains. This study points out an effective strategy to develop new NLO crystals with strong SHG response.
非线性光学（NLO）晶体在信息技术、微制造和医疗领域有着广泛应用。在此，一种具有强二次谐波产生（SHG）响应的新型铅混合卤化物CsPb(CH₃COO)Br₂I已被设计并合理合成。CsPb(CH₃COO)Br₂I是一种罕见的NLO晶体，其特点是三种不同的阴离子（I⁻、Br⁻和O⁻）同时与Pb(II)原子配位，形成具有大极化率的严重畸变的[PbBr₂I₂O₂]多面体。值得注意的是，CsPb(CH₃COO)Br₂I不仅表现出9倍于KH₂PO₄（KDP）的非常强的相位匹配SHG响应，还具有大的双折射（0.27@1064 nm）和高激光损伤阈值（LDT）。CsPb(CH₃COO)Br₂I的强SHG效应主要源于[PbBr₂I₂]链的取向排列。该研究指出了一种开发具有强SHG响应的新型NLO晶体的有效策略。
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