AZn2(BO3)Si2O5 (A = Rb, Cs): first examples of KBe2BO3F2 structure type in the borosilicate family exhibiting a deep-ultraviolet cutoff edge,Journal of Materials Chemistry C

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AZn2(BO3)Si2O5 (A = Rb, Cs): first examples of KBe2BO3F2 structure type in the borosilicate family exhibiting a deep-ultraviolet cutoff edge
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2021-12-24 , DOI: 10.1039/d1tc05529a
Tuohetijiang Baiheti _{1,

2} , Abudukadi Tudi _{1,

2} , Jian Han _{1,

2} , Zhihua Yang _{1,

2} , Shilie Pan _{1,

2}

Affiliation

The design and synthesis of nonlinear optical (NLO) crystals are of crucial significance owing to their pivotal role in solid-state lasers. Two dimensional (2D) [Be₂BO₃F₂]_∞ layers in the famous borate fluoride KBe₂BO₃F₂ (KBBF) are a potential source of excellent optical properties, therefore, from structural as well as property aspect KBBF has been employed as a plausible prototype for deep-ultraviolet (DUV) or ultraviolet (UV) NLO crystal design. Herein, the structure of KBBF was extended to the borosilicate system for the first time, and two novel borosilicate NLO crystals AZn₂(BO₃)Si₂O₅ (A = Rb, Cs) with a DUV cutoff edge were synthesized using the high-temperature solution method. In their structures, isolated BO₃ groups and one dimensional (1D) [Si₂O₅]_∞ chains coexist, owing to the connection of the adjacent 2D [Zn₂BO₅]_∞ layers by strong Si–O covalent bond structurally, both compounds can defeat the habit of layered crystal growth. Meanwhile, two compounds display a short UV cutoff edge (down to 190 nm) and possess a moderate second harmonic generation (SHG) response that is approximately 0.4 and 0.8 times that of KDP, respectively. The successful synthesis of AZn₂(BO₃)Si₂O₅ (A = Rb, Cs) may provide novel insights for the discovery of other KBBF structural variants with improved optical performances.

中文翻译：

AZn2(BO3)Si2O5 (A = Rb, Cs)：硼硅酸盐家族中 KBe2BO3F2 结构类型的第一个例子，表现出深紫外截止边缘

非线性光学 (NLO) 晶体的设计和合成由于它们在固态激光器中的关键作用而具有至关重要的意义。著名的氟化硼 KBe ₂ BO ₃ F ₂ (KBBF) 中的二维 (2D) [Be ₂ BO ₃ F ₂ ] _∞层是优异光学性能的潜在来源，因此，从结构和性能方面来看，KBBF用作深紫外 (DUV) 或紫外 (UV) NLO 晶体设计的合理原型。在此，KBBF的结构首次扩展到硼硅体系，以及两种新型硼硅NLO晶体AZn ₂ (BO ₃ )Si ₂使用高温溶液法合成具有 DUV 截止边缘的O ₅ (A = Rb, Cs)。在它们的结构中，孤立的 BO ₃基团和一维 (1D) [Si ₂ O ₅ ] _∞链共存，由于相邻的 2D [Zn ₂ BO ₅ ] _∞层在结构上通过强 Si-O 共价键连接，两者化合物可以破坏层状晶体生长的习惯。同时，两种化合物显示出较短的 UV 截止边缘（低至 190 nm），并具有中等的二次谐波产生 (SHG) 响应，分别约为 KDP 的 0.4 和 0.8 倍。AZn ₂ (BO ₃₎的成功合成)Si ₂ O ₅ (A = Rb, Cs) 可以为发现其他具有改进光学性能的 KBBF 结构变体提供新的见解。

更新日期：2022-01-12

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