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High switchable dielectric phase transition originating from distortion in inorganic–organic hybrid materials (H2dabco-C2H5) [MIICl4] (M = Co, Zn)

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Abstract

Two phase transition materials (H2dabco-C2H5)[ZnCl4] and (H2dabco-C2H5)[CoCl4] were synthesized and characterized. Differential scanning calorimetry detected that the two compounds underwent reversible phase transitions at 245 K and 261 K, respectively. The temperature dependence of the dielectric measurements also confirmed the phase transition. Variable-temperature single-crystal X-ray diffraction suggested that the two compounds underwent the same phase transitions from the space group Pnma to P21/c but at different temperatures. Symmetry breaking occurred with an Aizu notation of mmmF2/m. The structural phase transitions of 1 and 2 were ascribed to the distortion of a [H2dabco-C2H5]2+ cation from inorganic–organic hybrid materials (H2dabco-C2H5)[MIICl4] (M = Zn, Co). The strong variations of dielectric anomaly made compounds 1 and 2 applicable for use in promising switchable dielectric materials.

Graphical abstract: High switchable dielectric phase transition originating from distortion in inorganic–organic hybrid materials (H2dabco-C2H5) [MIICl4] (M = Co, Zn)

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Publication details

The article was received on 14 Feb 2018, accepted on 18 Mar 2018 and first published on 19 Mar 2018


Article type: Paper
DOI: 10.1039/C8DT00623G
Citation: Dalton Trans., 2018, Advance Article
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    High switchable dielectric phase transition originating from distortion in inorganic–organic hybrid materials (H2dabco-C2H5) [MIICl4] (M = Co, Zn)

    Q. Ji, L. Li, S. Deng, X. Cao and L. Chen, Dalton Trans., 2018, Advance Article , DOI: 10.1039/C8DT00623G

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