NH4Y(SO4)2·H2O and NH4YSO4F2: Two New Ammonium-Rare Earth Metal Sulfates with Enhanced Optical Anisotropy and Deep Ultraviolet Transmission

IF 1.5 4区 材料科学 Q3 Chemistry
Luyong Zhang, Shibin Wang, Zhencheng Wu, Xueling Hou, Zhihua Yang, Fangfang Zhang, Shilie Pan
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Abstract

Tetrahedral oxygenated groups with large highest occupied molecular orbital-lowest unoccupied molecular orbital (H gaps such as [SO4] are beneficial for deep ultraviolet (DUV) transmission but usually make against generating sufficient birefringence due to the small polarizability anisotropy. Thus, it is extremely difficult to obtain DUV transmission and large birefringence simultaneously in the search for DUV birefringent materials in sulfates. Herein, two new ammonium-rare earth metal sulfates, NH4Y(SO4)2·H2O and NH4YSO4F2, with DUV transmission are presented. Meanwhile, both exhibit greatly elevated birefringence through the involvement of NH4+ units, compared to Y2(SO4)3·8H2O. Their optical properties are further investigated by theoretical calculations, and the effect of the introduction of NH4+ into yttrium sulfate on optimizing the structures and properties is discussed. This work may provide a new perspective for further exploration of DUV birefringent materials in tetrahedral oxygenated group sulfates.

Abstract Image

NH4Y(SO4)2-H2O 和 NH4YSO4F2: 两种具有增强光学各向异性和深紫外透射率的新型铵稀土金属硫酸盐
具有大的最高占据分子轨道-最低未占据分子轨道(H 间隙)的四面体含氧基团(如 [SO4] )有利于深紫外(DUV)透射,但由于极化各向异性较小,通常无法产生足够的双折射。因此,在寻找硫酸盐中的深紫外双折射材料时,要同时获得深紫外透射和大双折射是极其困难的。本文介绍了两种具有紫外透射率的新型铵稀土金属硫酸盐--NH4Y(SO4)2-H2O 和 NH4YSO4F2。同时,与 Y2(SO4)3-8H2O 相比,由于 NH4+ 单元的参与,这两种物质的双折射性大大提高。通过理论计算进一步研究了它们的光学特性,并讨论了在硫酸钇中引入 NH4+ 对优化结构和特性的影响。这项研究为进一步探索四面体含氧基团硫酸盐中的 DUV 双折射材料提供了新的视角。
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来源期刊
CiteScore
2.50
自引率
6.70%
发文量
121
审稿时长
1.9 months
期刊介绍: The journal Crystal Research and Technology is a pure online Journal (since 2012). Crystal Research and Technology is an international journal examining all aspects of research within experimental, industrial, and theoretical crystallography. The journal covers the relevant aspects of -crystal growth techniques and phenomena (including bulk growth, thin films) -modern crystalline materials (e.g. smart materials, nanocrystals, quasicrystals, liquid crystals) -industrial crystallisation -application of crystals in materials science, electronics, data storage, and optics -experimental, simulation and theoretical studies of the structural properties of crystals -crystallographic computing
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