Sn2B5O9Cl: A Material with Large Birefringence Enhancement Activated Prepared via Alkaline-Earth-Metal Substitution by Tin
Sn2B5O9Cl: A Material with Large Birefringence Enhancement Activated Prepared via Alkaline-Earth-Metal Substitution by Tin
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DOI：
10.1002/anie.201911187
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发表时间：
2019-12-02
影响因子：
16.6
通讯作者：
Pan, Shilie
中科院分区：
文献类型：
--
作者：
Guo, Jingyu;Tudi, Abudukadi;Pan, Shilie
光学系统需要优良的双折射材料。本文报道了一种新化合物，即第一个硼酸锡氯化物，Sn_2B_5O_9Cl（SBOC），它具有很大的双折射率（在546 nm处为0.168）。它的双折射率是同结构Ba_2B_5O_9Cl（BBOC）化合物的16倍（在546 nm处为0.010@）。结果表明，双折射增强主要来源于Sn ~（2+）多面体。我们建议，双折射率可以通过取代碱土金属阳离子的Sn 2+阳离子的同构硼酸盐小的双折射率。这一策略将指导未来大双折射材料的发现。
The excellent birefringent materials are needed for optical systems. Herein, we reported a new compound, the first tin borate chloride, Sn2B5O9Cl (SBOC) with a large birefringence (0.168 at 546nm) measured by the polarizing microscope. Its birefringence is 16times that of the isostructural Ba2B5O9Cl (BBOC) compound (0.010@ at 546nm). The results show that the birefringence enhancement originates mainly from the Sn2+ polyhedra. We propose that the birefringence can be enlarged by substituting the alkaline-earth metal cation by the Sn2+ cation in the isostructural borate with small birefringence. This strategy will guide the discovery of large birefringent materials in the future.