New Alkaline-Earth Metal Fluoroiodates Exhibiting Large Birefringence and Short Ultraviolet Cutoff Edge with Highly Polarizable (IO3F)2– Units,Chemistry of Materials

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New Alkaline-Earth Metal Fluoroiodates Exhibiting Large Birefringence and Short Ultraviolet Cutoff Edge with Highly Polarizable (IO3F)2– Units
Chemistry of Materials ( IF 7.2 ) Pub Date : 2020-06-10 , DOI: 10.1021/acs.chemmater.0c01452
Minqiang Gai _{1,

2} , Tinghao Tong ₁ , Ying Wang ₁ , Zhihua Yang _{1,

2} , Shilie Pan _{1,

2}

Affiliation

By the selective fluorination of IO₄ in iodates, SrI₂O₅F₂ (SIOF) and Ba(IO₂F₂)₂ (BIOF) were synthesized successfully. They are the first reported cases of alkaline-earth metal fluoroiodates, and the (IO₃F)^2– units in SIOF were discovered for the first time to the best of our knowledge. BIOF possesses the shortest UV cutoff edge (230 nm), and SIOF has the largest birefringence (cal. 0.203 at 532 nm) among the reported fluoroiodates. The highly polarizable (IO₃F)^2–, with high polarizability anisotropy, induces a large birefringence in SIOF by theoretical calculation. This work will contribute to enlarge the structural diversity and provide a good choice for the material design in fluoroiodates.

中文翻译：

具有高偏振（IO ₃ F）^2–单元的新型碱土金属氟代酸盐具有大的双折射和短的紫外线截止边缘

通过对碘酸盐中的IO ₄进行选择性氟化，成功合成了SrI ₂ O ₅ F ₂（SIOF）和Ba（IO ₂ F ₂）₂（BIOF）。这是首次报道的碱土金属氟碘酸盐案例，据我们所知，SIOF中的（IO ₃ F）^2–单元是首次发现的。在报告的氟代碘酸盐中，BIOF具有最短的紫外线截止边缘（230 nm），而SIOF具有最大的双折射（在532 nm处约为0.203）。高度极化（IO ₃ F）^{2 –}通过理论计算，具有高极化率各向异性的SIOF引起SIOF中的大双折射。这项工作将有助于扩大结构的多样性，并为氟代碘酸盐的材料设计提供一个很好的选择。

更新日期：2020-07-14

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