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

作者：Li, Qiang; Shi, Ping-Ping; Ye, Qiong^*; Wang, Hui-Ting; Wu, De-Hong; Ye, Heng-Yun; Fu, Da-Wei; Zhang, Yi

来源：Inorganic Chemistry, 2015, 54(22): 10642-10647.

DOI：10.1021/acs.inorgchem.5b01437

• ROOM-TEMPERATURE
• ANOMALIES
• MOTIONS
• FERROELECTRICITY
• CRYSTALS
• DYNAMICS

A new organic-inorganic hybrid switchable and tunable dielectric compound, [(CH3)(4)P](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)(4)P](+) cations and [Mn(SCN)(6)](4-) anions in solid-state crystals.

• 出版日期2015-11-16
• 单位东南大学