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Polar Structure and Two-Dimensional Heisenberg Antiferromagnetic Properties of Arylamine-Based Manganese Chloride Layered Organic–Inorganic Perovskites
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2021-09-26 , DOI: 10.1021/acs.inorgchem.1c01011 Liany Septiany 1 , Diana Tulip 1 , Mikhail Chislov 2 , Jacob Baas 1 , Graeme R Blake 1
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2021-09-26 , DOI: 10.1021/acs.inorgchem.1c01011 Liany Septiany 1 , Diana Tulip 1 , Mikhail Chislov 2 , Jacob Baas 1 , Graeme R Blake 1
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The breaking of inversion symmetry can enhance the multifunctional properties of layered hybrid organic–inorganic perovskites. However, the mechanisms by which inversion symmetry can be broken are not well-understood. Here, we study a series of MnCl4-based 2D perovskites with arylamine cations, namely, (C6H5CxH2xNH3)2MnCl4 (x = 0, 1, 2, 3), for which the x = 0, 1, and 3 members are reported for the first time. The compounds with x = 1, 2, and 3 adopt polar crystal structures to well above room temperature. We argue that the inversion symmetry breaking in these compounds is related to the rotational degree of freedom of the organic cations, which determine the hydrogen bonding pattern that links the organic and inorganic layers. We show that the tilting of MnCl6 octahedra is not the primary mechanism involved in inversion symmetry breaking in these materials. All four compounds show 2D Heisenberg antiferromagnetic behavior. A ferromagnetic component develops in each case below the long-range magnetic ordering temperature of ∼42–46 K due to spin canting.
中文翻译：
芳胺基氯化锰层状有机-无机钙钛矿的极性结构和二维海森堡反铁磁性
反转对称性的破坏可以增强层状杂化有机-无机钙钛矿的多功能特性。然而，破坏反演对称性的机制尚不清楚。在这里，我们研究了一系列具有芳胺阳离子的基于MnCl 4的二维钙钛矿，即 (C 6 H 5 C x H 2 x NH 3 ) 2 MnCl 4 ( x = 0, 1, 2, 3)，其中x = 0, 1, 3 成员是第一次上报。与x的化合物= 1、2 和 3 采用极性晶体结构，远高于室温。我们认为这些化合物中的反转对称性破坏与有机阳离子的旋转自由度有关，它决定了连接有机层和无机层的氢键模式。我们表明，MnCl 6八面体的倾斜不是这些材料中反转对称性破坏的主要机制。所有四种化合物都显示出二维海森堡反铁磁行为。由于自旋倾斜，铁磁成分在每种情况下都在低于 42-46 K 的长程磁有序温度下发展。
更新日期：2021-10-18
中文翻译：
芳胺基氯化锰层状有机-无机钙钛矿的极性结构和二维海森堡反铁磁性
反转对称性的破坏可以增强层状杂化有机-无机钙钛矿的多功能特性。然而，破坏反演对称性的机制尚不清楚。在这里，我们研究了一系列具有芳胺阳离子的基于MnCl 4的二维钙钛矿，即 (C 6 H 5 C x H 2 x NH 3 ) 2 MnCl 4 ( x = 0, 1, 2, 3)，其中x = 0, 1, 3 成员是第一次上报。与x的化合物= 1、2 和 3 采用极性晶体结构，远高于室温。我们认为这些化合物中的反转对称性破坏与有机阳离子的旋转自由度有关，它决定了连接有机层和无机层的氢键模式。我们表明，MnCl 6八面体的倾斜不是这些材料中反转对称性破坏的主要机制。所有四种化合物都显示出二维海森堡反铁磁行为。由于自旋倾斜，铁磁成分在每种情况下都在低于 42-46 K 的长程磁有序温度下发展。
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