材料科学
双折射
紫外线
共轭体系
聚合
调制(音乐)
光化学
光电子学
聚合物
光学
化学
复合材料
哲学
物理
美学
作者
Yanran Shang,Hongyuan Sha,Zujian Wang,Rongbing Su,Chao He,Xiaoming Yang,Xifa Long
标识
DOI:10.1002/adom.202302844
摘要
Abstract Sulfates with a large bandgap are always promising optical candidates. However, due to insufficient birefringence, their applications are restricted. Here, in terms of this deficiency, two strategies are proposed to rationally modulate the optical anisotropy of sulfates by cations and anions, respectively. For the cation modulation, the [C(NH 2 ) 3 ]Al(SO 4 ) 2 ·6H 2 O crystal is investigated, which exhibits an unprecedented birefringence (0.098 @ 546 nm) compared with other deep‐ultraviolet transparent sulfates, resulting from the synergy of π‐conjugated [C(NH 2 ) 3 ] + and non‐π‐conjugated [SO 4 ] 2− groups. For the anion modulation, a novel functional group, [S 3 O 6 ] 2− , with a large polarizability anisotropy, is designed. Thus, a new crystal, NaKS 3 O 6 , is obtained, which exhibits a large birefringence of 0.130 @ 546 nm with a short ultraviolet absorption cutoff edge of 215 nm. These results confirm the validity of the strategies. Therefore, the strategies play an important role in improving sulfate's birefringence and then promoting their potential applications in advanced optical systems.
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