Chemistry Letters
Online ISSN : 1348-0715
Print ISSN : 0366-7022
ISSN-L : 0366-7022
Letter
New Organic Ferroelectrics: Cocrystal of 5,5′-Dimethyl-2,2′-bipyridine and Bromanilic Acid
Yasuhisa YamamuraErika SaitoHideki SaitohNorie HoshinoKazuya Saito
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2012 Volume 41 Issue 1 Pages 119-121

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Abstract

Cocrystal 55DMBP–H2ba was synthesized and characterized. The crystal structure is isostructural to cocrystal 55DMBP–H2ia with iodanilic acid. The heat capacity, dielectric permittivity, and polarization–electric field hysteresis showed that the 55DMBP–H2ba undergoes a paraelectric–ferroelectic phase transition at 253 K on cooling. The transition mechanism is discussed through the analysis of isotropic temperature factors of atoms.

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© 2012 The Chemical Society of Japan
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