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Finding Short-Wavelength Birefringent Crystals with Large Optical Anisotropy Activated by π-Conjugated [C(NH2)3] Units
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2021-02-03 , DOI: 10.1021/acs.cgd.1c00024
Ming Xia 1, 2 , Miriding Mutailipu 1, 2 , Fuming Li 1, 2 , Zhihua Yang 1, 2 , Shilie Pan 1, 2
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2021-02-03 , DOI: 10.1021/acs.cgd.1c00024
Ming Xia 1, 2 , Miriding Mutailipu 1, 2 , Fuming Li 1, 2 , Zhihua Yang 1, 2 , Shilie Pan 1, 2
Affiliation
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Looking for ultraviolet (UV) crystals with large birefringence that are easy to grow, and nontoxic, has always been a hotspot in the field of optical materials. Thus, finding novel chromophores and discovering new candidates that are constructed by them enable us to obtain high performance short-wavelength birefringent crystals. Here, we synthesized five guanidine-based crystals with large birefringence (calcd. 0.072–0.371@532 nm) and short UV cutoff edges (201–254 nm). Among them, [C(NH2)3]HC2O4·H2O possesses a giant birefringence of Δn = 0.371@532 nm, which is even larger than that of most of the commercialized UV birefringent crystals. Moreover, these crystals can be obtained by a simple aqueous solution volatilization method, and they have unique advantages including low cost, easy to grow, and free of toxic reactants. Further analysis confirmed that the large birefringence in them originates from the π-conjugated [C(NH2)3] units, which implies that the guanidine-based compound is a promising system for exploring UV and even deep-UV materials with large birefringence.
中文翻译：
寻找具有π共轭[C（NH 2）3 ]单元激活的大光学各向异性的短波长双折射晶体
寻找易于生长且无毒的具有大双折射的紫外线（UV）晶体一直是光学材料领域的热点。因此，发现新颖的发色团并发现由它们构成的新候选物使我们能够获得高性能的短波长双折射晶体。在这里，我们合成了五种基于胍的晶体，它们具有大的双折射（计算值为0.072–0.371@532 nm）和短的UV截止边缘（201–254 nm）。其中，[C（NH 2）3 ] HC 2 O 4 ·H 2 O具有Δn的大双折射。= 0.371@532 nm，甚至比大多数商品化的UV双折射晶体大。此外，这些晶体可以通过简单的水溶液挥发方法获得，并且它们具有独特的优点，包括低成本，易于生长并且不含有毒的反应物。进一步的分析证实，它们中的大双折射源于π共轭[C（NH 2）3 ]单元，这意味着基于胍的化合物是用于探索具有大双折射的UV甚至深紫外材料的有前途的系统。
更新日期：2021-03-03
中文翻译：
寻找具有π共轭[C（NH 2）3 ]单元激活的大光学各向异性的短波长双折射晶体
寻找易于生长且无毒的具有大双折射的紫外线（UV）晶体一直是光学材料领域的热点。因此，发现新颖的发色团并发现由它们构成的新候选物使我们能够获得高性能的短波长双折射晶体。在这里，我们合成了五种基于胍的晶体，它们具有大的双折射（计算值为0.072–0.371@532 nm）和短的UV截止边缘（201–254 nm）。其中，[C（NH 2）3 ] HC 2 O 4 ·H 2 O具有Δn的大双折射。= 0.371@532 nm，甚至比大多数商品化的UV双折射晶体大。此外，这些晶体可以通过简单的水溶液挥发方法获得，并且它们具有独特的优点，包括低成本，易于生长并且不含有毒的反应物。进一步的分析证实，它们中的大双折射源于π共轭[C（NH 2）3 ]单元，这意味着基于胍的化合物是用于探索具有大双折射的UV甚至深紫外材料的有前途的系统。
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