Dielectric and nonlinear optical dual switching in an organic–inorganic hybrid relaxor [(CH3)3PCH2OH][Cd(SCN)3],Inorganic Chemistry Frontiers

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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 ₃）₃ 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 ₃）₃ 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 ₃）₃ 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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