Electric and Thermosalient Properties of a Charge-Transfer Complex Exhibiting a Minor Valence Instability Transition
Electric and Thermosalient Properties of a Charge-Transfer Complex Exhibiting a Minor Valence Instability Transition
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表现出次要价态不稳定性跃迁的电荷转移复合物的电和热凸性质
DOI：
10.1021/acs.cgd.0c00516
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发表时间：
2020
影响因子：
3.8
通讯作者：
Awaga Kunio
中科院分区：
文献类型：
--
作者：
Takahashi Yukihiro;Kondo Tsubasa;Yokokura Seiya;Takehisa Mika;Harada Jun;Inabe Tamotsu;Matsushita Michio M.;Awaga Kunio
研究了电荷转移配合物3，3 ′，5，5 ′-四甲基苯并二嗪-7，7，8，8-四氰基醌二甲烷（CT）的热凸效应。CT复合体很少观察到这种反应。此外，虽然已知这种晶体复合物具有有趣的相变，其中电荷分布在低温下发生变化，但该材料的单晶的一些物理性质是未知的，因为晶体在热凸极事件期间破裂。在这项研究中，我们使用了聚合物涂层的方法，以防止开裂的晶体，使我们能够观察到急剧变化的电阻率和铁电样介电响应伴随着在低温下的相变。这一结果表明，由于CT复合物具有各种电和磁功能和物理性质，因此可以制备具有机械响应和电和磁功能的有机固体。
The charge-transfer (CT) complex 3,3′,5,5′-tetramethylbendizine-7,7,8,8-tetracyanoquinodimethane was found to display the thermosalient effect, in which crystals exhibit mechanical responses due to temperature changes. Such responses are rarely observed with CT complexes. Furthermore, while this crystalline complex was known to have an interesting phase transition in which the charge distribution changes at low temperatures, some of the physical properties of single crystals of the material were unknown, because the crystal is broken during the thermosalient event. In this study, we used a polymer-coating method to prevent cracking of the crystal, allowing us to observe drastic changes in resistivity and ferroelectric-like dielectric response accompanied by the phase transition at low temperature. This result suggests that organic solids with mechanical response and electric and magnetic functions can be produced, since CT complexes exhibit various electric and magnetic functions and physical properties.