A Switchable Molecular Dielectric with Two Sequential Reversible Phase Transitions: [(CH3)4P]4[Mn(SCN)6]

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• 作者：Qiang Li ; Ping-Ping Shi ; Qiong Ye ; Hui-Ting Wang ; De-Hong Wu ; Heng-Yun Ye ; Da-Wei Fu ; Yi Zhang
• 刊名：Inorganic Chemistry
• 出版年：2015
• 出版时间：November 16, 2015
• 年：2015
• 卷：54
• 期：22
• 页码：10642-10647
• 全文大小：413K
• ISSN：1520-510X

文摘

A new organic鈥搃norganic hybrid switchable and tunable dielectric compound, [(CH₃)₄P]₄[Mn(SCN)₆] (1), exhibits three distinct dielectric states above room temperature and undergoes two reversible solid-state phase transitions, including a structural phase transition at 330 K and a ferroelastic phase transition with the Aizu notation of mmmF2/m at 352 K. The variable-temperature structural analyses disclose that the origin of the phase transitions and dielectric anomalies can be ascribed to the reorientation or motion of both the [(CH₃)₄P]⁺ cations and [Mn(SCN)₆]^{4鈥?/sup> anions in solid-state crystals.}