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Issue 13, 2014
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A sequentially switchable molecular dielectric material tuned by the stepwise ordering in diisopropylammonium trifluoromethanesulfonate

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Abstract

A novel switchable and tunable molecular dielectric material, diisopropylammonium trifluoromethanesulfonate (1), which undergoes two reversible second-order solid state phase transitions at 200 K (TcL) and 340 K (TcH) respectively, has been successfully synthesized and grown as bulk crystals. The differential scanning calorimetry (DSC) measurements, and dielectric and variable-temperature single-crystal X-ray diffraction studies confirmed the stepwise phase transitions. 1 exhibits a remarkable temperature-dependent dielectric behavior, which could be tuned through three distinctive states triggered by the temperature change. Temperature-dependent single crystal structural analyses of 1 reveal a collection of exceptionally distinct and synchronous molecular motions of both the cationic and anionic moieties in 1, and that the interesting stepwise ordering of cations and anions are mainly responsible for its switchable and tunable dielectric properties. All of this demonstrates its potential application as a switchable and tunable molecular dielectric material.

Graphical abstract: A sequentially switchable molecular dielectric material tuned by the stepwise ordering in diisopropylammonium trifluoromethanesulfonate

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Article information


Submitted
14 Nov 2013
Accepted
27 Dec 2013
First published
06 Jan 2014

J. Mater. Chem. C, 2014,2, 2341-2345
Article type
Paper
Author version available

A sequentially switchable molecular dielectric material tuned by the stepwise ordering in diisopropylammonium trifluoromethanesulfonate

P. Zhou, Z. Sun, S. Zhang, C. Ji, S. Zhao, R. Xiong and J. Luo, J. Mater. Chem. C, 2014, 2, 2341
DOI: 10.1039/C3TC32238F

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