Ba2M(C3N3O3)(2) (M = Mg, Ca): potential UV birefringent materials with strengthened optical anisotropy originating from the (C3N3O3)(3-) group
Ba2M(C3N3O3)(2) (M = Mg, Ca): potential UV birefringent materials with strengthened optical anisotropy originating from the (C3N3O3)(3-) group
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Ba2M(C3N3O3)(2) (M = Mg, Ca)：源自 (C3N3O3)(3-) 基团的具有增强光学各向异性的潜在紫外双折射材料
DOI：
10.1039/c8tc04710c
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发表时间：
2018
影响因子：
6.4
通讯作者：
Chen Chuangtian
中科院分区：
文献类型：
--
作者：
Li Zhuang;Liang Fei;Guo Yangwu;Lin Zheshuai;Yao Jiyong;Zhang Guochun;Yin Wenlong;Wu Yicheng;Chen Chuangtian
随着紫外技术的迅速发展，对紫外双折射材料的需求急剧增长。在这里，一个新的家庭的紫外双折射材料，Ba_2 Mg（C_3 N_3 O_3）_2（BMCY）和Ba_2Ca（C_3 N_3 O_3）_2（BCCY），已被成功发现。这是第一次研究氰尿酸盐的优异双折射性能。结果表明，BMCY和BCCY在230 ~ 800 nm波长范围内的双折射率分别为0.728-0.351和0.771-0.346，远大于商业紫外双折射晶体α-BaB_2 O_4（α-BBO）的双折射率（Δ n = 0.12@532 nm）。我们的研究表明，BMCY和BCCY令人印象深刻的光学性质源于平面（C3 N3 O3）3−基团与等电子（B3 O 6）3−基团相比增强的光学各向异性。此外，它的同成分熔化特性使得用Bridgman-Stockbarger技术生长大块晶体成为可能。BMCY和BCCY的优异性能为双折射材料的实际应用提供了一条新的途径。
Demands for UV birefringent materials are growing dramatically owing to the rapid development of ultraviolet technology. Here, a new family of UV birefringent materials, Ba2Mg(C3N3O3)2 (BMCY) and Ba2Ca(C3N3O3)2 (BCCY), have been successfully discovered. It is the first time that the excellent birefringent properties of cyanurates have been studied. These materials exhibit an extremely large birefringence (Δn = 0.728–0.351 and 0.771–0.346 from 230 nm to 800 nm for BMCY and BCCY, respectively), much larger than that of the commercial UV birefringent crystal α-BaB2O4 (α-BBO) (Δn = 0.12@532 nm). Our study indicates that the impressive optical properties of BMCY and BCCY stem from the strengthened optical anisotropy of the planar (C3N3O3)3− group compared with the isoelectronic (B3O6)3− group. Besides, its congruent-melting properties make it feasible to grow a bulk crystal by the Bridgman–Stockbarger technique. The extraordinary properties of BMCY and BCCY may shed light on a new path to explore birefringent materials for practical application.