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Issue 49, 2018
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Temperature controlled formation of polar copper phosphonates showing large dielectric anisotropy and a dehydration-induced switch from ferromagnetic to antiferromagnetic interactions

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Abstract

The reaction of copper(II) chloride with 2-carboxyphenylphosphonic acid (2-cppH3) under hydrothermal conditions at 100 °C results in the formation of a polar compound, Cu3(2-cpp)2(H2O)5 (1), which shows large dielectric anisotropy. A similar reaction at 140 °C results in a centrosymmetric phase, Cu3(2-cpp)2(H2O)2 (2). Compound 1 can convert into 2 upon increasing the reaction temperature under hydrothermal conditions, and further to Cu3(2-cpp)2 (3) upon thermal treatment at 240 °C. This process is accompanied by a switch from ferromagnetic in 1 to antiferromagnetic interactions in 2 and 3.

Graphical abstract: Temperature controlled formation of polar copper phosphonates showing large dielectric anisotropy and a dehydration-induced switch from ferromagnetic to antiferromagnetic interactions

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Publication details

The article was received on 09 Apr 2018, accepted on 23 May 2018 and first published on 23 May 2018


Article type: Communication
DOI: 10.1039/C8CC02819B
Citation: Chem. Commun., 2018,54, 6276-6279
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    Temperature controlled formation of polar copper phosphonates showing large dielectric anisotropy and a dehydration-induced switch from ferromagnetic to antiferromagnetic interactions

    P. Wang, S. Bao, X. Huang, T. Akutagawa and L. Zheng, Chem. Commun., 2018, 54, 6276
    DOI: 10.1039/C8CC02819B

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