LiO4 tetrahedra lock the alignment of π-conjugated layers to maximize optical anisotropy in metal hydroisocyanurates

被引：38
作者：
Meng, Xianghe [1 ,4 ]
Liang, Fei [1 ]
Tang, Jian [2 ,3 ]
Kang, Kaijin [2 ,3 ]
Yin, Wenlong [2 ]
Zeng, Tixian [3 ]
Kang, Bin [2 ]
Lin, Zheshuai [1 ]
Xia, Mingjun [1 ,4 ]
机构：
[1] Chinese Acad Sci, Beijing Ctr Crystal Res & Dev, Key Lab Funct Crystals & Laser Technol, Tech Inst Phys & Chem, Beijing 100190, Peoples R China
[2] China Acad Engn Phys, Inst Chem Mat, Mianyang 621900, Sichuan, Peoples R China
[3] China West Normal Univ, Phys & Space Sci Coll, Nanchong 637002, Peoples R China
[4] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
来源：
INORGANIC CHEMISTRY FRONTIERS | 2019年 / 6卷 / 10期
基金：
中国国家自然科学基金;
关键词：
REFRACTIVE-INDEX; CYANURATE; UV; BIREFRINGENCE; GENERATION; CRYSTALS; GROWTH;
D O I：
10.1039/c9qi01047e
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Parallel and compact alignments of pi-conjugated anions in a crystal are of importance to maximize the optical anisotropy of crystalline materials. Our attempts to design colossal birefringence in metal hydroisocyanurates M2N(H2C3N3O3)(4)center dot 6H(2)O (M/N = Li/Ca and Na/Ba) were successful using cation coordination control. In particular, Li2Ca(H2C3N3O3)(4)center dot 6H(2)O (LCHCY) shows the largest birefringence (Delta n = 0.407@800 nm) among all the reported metal cyanurates and hydroisocyanurates, even larger than that of 2D BN layers, due to the reinforced lock effect of basal oxygens from LiO4 tetrahedra. LCHCY is a novel promising ultraviolet birefringent crystal with a short ultraviolet cut-off and a wide transmission range.
引用
收藏
页码：2850 / 2854
页数：5
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