Macroscopic Polarization Change of Mononuclear Valence Tautomeric Cobalt Complexes Through the Use of Enantiopure Ligand
Macroscopic Polarization Change of Mononuclear Valence Tautomeric Cobalt Complexes Through the Use of Enantiopure Ligand
复制标题
通过使用对映体纯配体改变单核价互变钴配合物的宏观偏振
DOI：
10.1002/chem.202202161
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Sato Osamu
中科院分区：
文献类型：
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作者：
Cheng Feng;Wu Shuqi;Zheng Wenwei;Su Shengqun;Nakanishi Takumi;Xu Wenhuang;Sadhukhan Pritam;Sejima Hibiki;Ikenaga Shimon;Yamamoto Kaoru;Gao Kaige;Kanegawa Shinji;Sato Osamu
在极性空间群中具有电子转移性质的配合物的结晶可以诱导晶体在特定方向上的极化开关，这对于传感器、存储器件和电容器的发展是有吸引力的。不幸的是，在极性空间群中结晶的可能性通常很低。注意到对映体纯化合物在Sohncke空间群中结晶，本文报道了一种基于分子内电子转移和手性的非铁电极化开关晶体的分子设计策略。此外，本文还描述了带有对映体纯配体的单核价互变异构（VT）钴配合物的合成。对映体的引入使得络合物在极性空间群（P21）中结晶。晶体沿着b轴方向的极化没有被抵消，VT转变伴随着极性晶体的宏观极化的变化。通过电子转移的极化开关在室温附近实现。
The crystallization of a complex having electron transfer properties in a polar space group can induce the polarization switching of a crystal in a specific direction, which is attractive for the development of sensors, memory devices, and capacitors. Unfortunately, the probability of crystallization in a polar space group is usually low. Noticing that enantiopure compounds crystallize in Sohncke space groups, this paper reports a strategy for the molecular design of non‐ferroelectric polarization switching crystals based on the use of intramolecular electron transfer and chirality. In addition, this paper describes the synthesis of a mononuclear valence tautomeric (VT) cobalt complex bearing an enantiopure ligand. The introduction of enantiomer enables the crystallization of the complex in the polar space group (P21). The polarization of the crystals along theb‐axis direction is not canceled out and the VT transition is accompanied by a change in the macroscopic polarization of the polar crystal. Polarization switching via electron transfer is realized at around room temperature.