Pb18O8Cl15I5: A Polar Lead Mixed Oxyhalide with Unprecedented Architecture and Excellent Infrared Nonlinear Optical Properties
Pb18O8Cl15I5: A Polar Lead Mixed Oxyhalide with Unprecedented Architecture and Excellent Infrared Nonlinear Optical Properties
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Pb18O8Cl15I5：一种极性铅混合卤氧化物，具有前所未有的结构和优异的红外非线性光学性能
DOI：
10.1002/anie.202009541
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发表时间：
2020-09-25
影响因子：
16.6
通讯作者：
Ok, Kang Min
中科院分区：
文献类型：
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作者：
Chen, Xinglong;Jing, Qun;Ok, Kang Min
为了开发高性能红外非线性光学材料，我们采用合理的元素组成设计策略，研究了PbO-PbCl_2-PbI（2）体系。通过这样做，我们发现了一种新的极性铅混合卤氧化物，Pb 18 O 8 Cl 15 I5，第一个合成的金属卤氧化物结合Cl（-）和I-。Pb（18）O（8）Cl（15）I（5）显示出前所未有的结构特征，具有两种不同尺寸类型的氧心Pb-O单元，即[O 4Pb 8]（8+）簇和[OPb 2]（2+）链。在室温条件下成功地生长了厘米级Pb（18）O（8）Cl（15）I（5）单晶。值得注意的是，Pb（18）O（8）Cl（15）I（5）满足高性能IR NLO材料的所有基本但严格的标准，表现出最宽的IR透明度（高达16.0 μ m）、强的二次谐波产生响应（1.05 × AgGaS（2））、上级双折射（636 nm处为0.086）和高的激光诱导损伤阈值（8.5 × AgGaS（2））。
To develop high-performance nonlinear optical (NLO) materials for infrared (IR) applications, we have applied a rational element-composition design strategy and investigated the unexplored PbO-PbCl2-PbI(2)system. By doing so, we discovered a new polar lead mixed oxyhalide, Pb18O8Cl15I5, the first synthetic metal oxyhalide combining both Cl(-)and I-. Pb(18)O(8)Cl(15)I(5)reveals an unprecedented structural feature with two different dimensional types of oxocentered Pb-O units, namely, [O4Pb8](8+)clusters and [OPb2](2+)chains. Centimeter-sized single crystals of Pb(18)O(8)Cl(15)I(5)have been successfully grown under ambient conditions. Remarkably, Pb(18)O(8)Cl(15)I(5)satisfies all fundamental yet rigorous criteria for high-performance IR NLO materials, exhibiting the widest IR transparency (up to 16.0 mu m) among oxide-based crystals, strong second-harmonic generation response (1.05xAgGaS(2)), superior birefringence (0.086 at 636 nm), and a high laser-induced damage threshold (8.5xAgGaS(2)).