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Dielectric and nonlinear optical dual switching in an organic–inorganic hybrid relaxor [(CH3)3PCH2OH][Cd(SCN)3]
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2017-06-19 00:00:00 , DOI: 10.1039/c7qi00300e
Xuan Zheng 1, 2, 3, 4, 5 , Ping-Ping Shi 1, 2, 3, 4, 5 , Yang Lu 1, 2, 3, 4, 5 , Lin Zhou 1, 2, 3, 4, 5 , Ji-Xing Gao 1, 2, 3, 4, 5 , Fu-Juan Geng 1, 2, 3, 4, 5 , De-Hong Wu 1, 2, 3, 4, 5 , Da-Wei Fu 1, 2, 3, 4, 5 , Qiong Ye 1, 2, 3, 4, 5
Affiliation  

A new organic–inorganic hybrid compound [(CH3)3PCH2OH][Cd(SCN)3] (1) has been synthesized, which exhibits a reversible phase transition at 248.5 K confirmed by differential scanning calorimetry. The phase transition in 1 is from a centrosymmetric space group Pmcn to a non-centrosymmetric space group P21, so that 1 exhibits a switchable second harmonic generation (SHG) effect between SHG-on and SHG-off states. This phase transition also displays switchable dielectric behaviors between high and low dielectric states accompanied by the remarkable dielectric relaxation described by the Cole–Cole equation. Variable-temperature single-crystal X-ray diffraction analyses reveal that the origin of the phase transition can be attributed to the motion or reorientation of the [(CH3)3PCH2OH]+ cations and the movement of (SCN) ions in solid-state crystals. These superior physical properties suggest that 1 could be a potential switchable dielectric and NLO relaxor-type material, which provides a new approach to design novel multiple switch materials.

中文翻译:

有机-无机混合弛豫[[CH 33 PCH 2 OH] [Cd(SCN)3 ]中的介电和非线性光学双重转换

合成了一种新的有机-无机杂化化合物[(CH 33 PCH 2 OH] [Cd(SCN)3 ](1),通过差示扫描量热法证实该化合物在248.5 K处具有可逆相变。在相变1是从中心对称空间群PMCn寄存器到一个非中心对称空间群P 2 1,以使得1在SHG-on和SHG-off状态之间展现出可切换的二次谐波产生(SHG)效果。这种相变还显示出高和低介电态之间可切换的介电行为,并伴随着Cole–Cole方程描述的显着介电弛豫。可变温度单晶X射线衍射分析表明,相变的起源可归因于[(CH 33 PCH 2 OH] +阳离子的运动或重新取向以及(SCN)-离子的运动在固态晶体中 这些优越的物理性能表明1 可能是一种潜在的可切换电介质和NLO弛豫型材料,这为设计新颖的多种开关材料提供了一种新方法。
更新日期:2017-09-12
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