A Solvent Free Neutral Cobalt Complex Exhibiting Macroscopic Polarization Switching Induced by Directional Charge Transfer

IF 5.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Nano Materials Pub Date : 2024-10-08 DOI:10.1039/d4qi01389a

Ziqi Zhou, Shu-Qi Wu, Qirui Shui, Wen-Wei Zheng, Akari Maeda, Xiaopeng Zhang, Jing Chu, Shinji Kanegawa, Shengqun Su, Osamu Sato

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引用次数: 0

Abstract

Materials with polarization switching induced by directional charge transfer under the external stimuli are of great interest due to their fast swicthing rate and potential applications. Nonetheless, most of these crystals contain solvents or counter ions, and their effects during measurement or calculations are far from trivial. Therefore, synthesizing a solvent-free and neutral complex exhibiting polarization switching is highly desirable. Herein, we successfully observe directional charge transfer-induced electronic pyroelectricity in a solvent-free neutral cobalt complex, namely Co(teeda)(3,6-dbq)2 (teeda = N,N,N’,N’-tetraethylethane-1,2-diamine and 3,6-dbq = 3,6-di-tert-butylcatecholate or 3,6-di-tert-butylsemiquinonate). The charge transfer property is confirmed by magnetometry, infrared and UV-vis-NIR spectroscopy, and single-crystal X-ray diffraction (SCXRD) measurements. Furthermore, pyroelectric current is observed during the valence tautomerism (VT) process. Theoretical calculations demonstrate that the origin of polarization switching is mainly ascribed to the charge transfer. These results indicate that Co(teeda)(3,6-dbq)2 is a promising candidate for exploring new VT compounds that exhibit polarization switching.

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一种无溶剂中性钴络合物，在定向电荷转移的诱导下表现出宏观极化转换功能

在外部刺激下通过定向电荷转移诱导极化切换的材料因其快速切换率和潜在应用而备受关注。然而，这些晶体大多含有溶剂或反离子，它们在测量或计算过程中的影响微乎其微。因此，合成一种无溶剂且具有极化切换功能的中性复合物是非常理想的。在这里，我们成功地在无溶剂中性钴复合物 Co(teeda)(3,6-dbq)2 （teeda = N,N,N',N'-tetraylethane-1,2-diamine 和 3,6-dbq = 3,6-di-ter-t-butylcatecholate 或 3,6-di-ter-t-butylsemiquinonate ）中观察到了电荷转移诱导的定向电子热释电。电荷转移特性通过磁力测量、红外光谱、紫外-可见-近红外光谱和单晶 X 射线衍射 (SCXRD) 测量得到了证实。此外，在价态同分异构（VT）过程中还观察到了热释电电流。理论计算表明，极化切换的起源主要归因于电荷转移。这些结果表明，Co(teeda)(3,6-dbq)2 是探索表现出极化转换的新型 VT 化合物的理想候选物质。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Applied Nano Materials Multiple-

CiteScore

8.30

自引率

3.40%

发文量

1601

期刊介绍： ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.