A novel ferroelectric based on quinuclidine derivatives

• Published in: Chinese chemical letters Vol. 31; no. 6; pp. 1686 - 1689
• Main Authors: Deng, Siyu, Li, Junyi, Chen, Xiang, Hou, Yunlong, Chen, Lizhuang
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.06.2020; School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
• Subjects: Dielectric; Ferroelectric; Phase transition; Polarization; Quinuclidine; Ferroelectric; Polarization; Dielectric; Quinuclidine; Phase transition
• ISSN: 1001-8417; 1878-5964
• DOI: 10.1016/j.cclet.2019.11.011

One phase transition material [(CH3)2CH-C3H17N][CoBr4] was synthesized and underwent the phase transitionsfrom space group C2/c to Cc. The structural phase transition of 1 was ascribed to the distortion of [(CH3)2CH-C3H17N]2+ cation. The change of the dielectric permittivity and the spontaneous polarization gives compound 1 greater application potential for low temperature ferroelectrics. [Display omitted] The compound [(CH3)2CH-C3H17N][CoBr4] (1) based on quinuclidine derivatives was achieved by the solution synthetic method and characterized by elemental analysis, infrared spectroscopy, single-crystal X-ray structural analysis and dielectric measurement, respectively. Variable-temperature single-crystal X-ray diffraction suggested that the compound underwent the phase transition from the space group C2/c to Cc. The polarization curve was measured using the Sawyer-Tower circuit. The structural phase transitions of 1 was ascribed to the distortion of a [(CH3)2CH-C3H17N]2+ cation from this inorganic–organic hybrid material [(CH3)2CH-C3H17N][CoBr4]. The strong change in dielectric anomalies makes compound 1 a suitable candidate for promising switchable dielectric materials. This work represents a feasible strategy thought for the targeted harvesting of low temperature ferroelectrics.