重质稀土金属碘酸钠盐的设计、合成与非线性光学性能研究  

Design,Synthesis and Nonlinear Optical Properties of aSeries of Heavy Rare-Earth Metal Sodium Iodates

作　　者：刘宏鸣[1] 王晓晓 孟祥高[2] 陈兴国[1] 秦金贵[1] LIU Hongming;WANG Xiaoxiao;MENG Xianggao;CHEN Xingguo;QIN Jingui(College of Chemistry and Molecular Science,Wuhan University,Wuhan 430072,China;College of Chemistry,Central China Normal University,Wuhan 430079,China)

机构地区：[1]武汉大学化学与分子科学学院,武汉430072 [2]华中师范大学化学学院,武汉430079

出　　处：《人工晶体学报》2020年第8期1523-1530,共8页Journal of Synthetic Crystals

基　　金：国家自然科学基金重大研究计划(91622124)。

摘　　要：通过等价金属离子同位替换的分子设计策略,合成了五个含有重质稀土元素的碘酸钠盐NaRE(IO 3)4(RE=Dy,Ho,Er,Yb,Lu),采用单晶衍射技术测定了它们的晶体结构,该系列化合物互为异质同构体,隶属于非中心对称的单斜晶系,Cc空间群。采用紫外-可见吸收光谱、红外光谱、热失重分析、倍频效应测试等手段表征了它们的线性和非线性光学性质及其热稳定性。该系列化合物的二阶非线性光学效应表现出非常明显的差异,倍频效应在0.1~3.3×KDP之间且能够相位匹配;它们的光学带隙均大于3.85 eV,热分解温度达到520℃以上。Through the design strategy of equivalent metal-ion substitution,five sodium iodates containing heavy rare-earth elements,NaRE(IO 3)4(RE=Dy,Ho,Er,Yb,Lu),were synthesized.Their crystal structures were determined using single crystal X-ray diffraction.These compounds are heterogeneous isomers with the same non-centrosymmetric monoclinic space group,Cc.The linear and nonlinear optical(NLO)properties as well as thermal stability were characterized by UV-Vis absorption spectroscopy,infrared spectroscopy,thermogravimetric analysis and second harmonic generation(SHG)measurement,respectively.The second-order NLO effects of these compounds are quite different and their SHG intensities are in the range of 0.1 to 3.3 times than that of KDP with phase-maching characteristics.The energy band gaps are all over 3.85 eV and thermal decomposition temperatures are above 520℃.

关 键 词：重质稀土元素 碘酸钠盐 非线性光学晶体 电子跃迁 热稳定性 

分 类 号：O741[理学—晶体学]