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Issue 32, 2016
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Reversible phase transition driven by order–disorder transformations of metal-halide moieties in [(C6H14)NH2]2·CuBr4

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Abstract

A novel phase transition has been discovered where the phase transition is primarily accomplished by the order–disorder transformation of metal-coordinated halogen atoms in an organic–inorganic hybrid material [(C6H14)NH2]2·CuBr4 (1). Its phase transition behaviour was verified by specific heat capacity (Cp) and differential scanning calorimetry (DSC) measurements with a thermal hysteresis at 4.8 K. The dielectric measurements of 1 show a distinct step-like anomaly around Tc, demonstrating two states at two different phases, which enlightens that 1 can be conceived as a potential switchable dielectric material. Moreover, temperature-dependent single-crystal X-ray diffraction analyses of 1 disclose that disordering of metal-halides together with reorientations of the cations is the cause of this unique phase-transition material. All these results open a new way to design and assemble novel phase transition materials.

Graphical abstract: Reversible phase transition driven by order–disorder transformations of metal-halide moieties in [(C6H14)NH2]2·CuBr4

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Publication details

The article was received on 17 May 2016, accepted on 07 Jun 2016 and first published on 08 Jun 2016


Article type: Communication
DOI: 10.1039/C6TC02034H
Citation: J. Mater. Chem. C, 2016,4, 7537-7540
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    Reversible phase transition driven by order–disorder transformations of metal-halide moieties in [(C6H14)NH2]2·CuBr4

    M. A. Asghar, S. Zhang, T. Khan, Z. Sun, A. Zeb, C. Ji, L. Li, S. Zhao and J. Luo, J. Mater. Chem. C, 2016, 4, 7537
    DOI: 10.1039/C6TC02034H

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