Polar Structure and Two-Dimensional Heisenberg Antiferromagnetic Properties of Arylamine-Based Manganese Chloride Layered Organic–Inorganic Perovskites

Autor: Mikhail V. Chislov, Jacob Baas, Diana Tulip, Graeme R. Blake, Liany Septiany
Přispěvatelé: Solid State Materials for Electronics
Rok vydání: 2021
Předmět:
Zdroj: Inorganic Chemistry
Inorganic Chemistry, 60(20), 15151-15158. AMER CHEMICAL SOC
ISSN: 1520-510X
0020-1669
DOI: 10.1021/acs.inorgchem.1c01011
Popis: 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.
We study a series of MnCl4-based 2D perovskites with arylamine cations: (C6H5CxH2xNH3)2MnCl4 (x = 0, 1, 2, 3). The compounds with x = 1, 2 and 3 adopt polar crystal structures to well above room temperature. The inversion symmetry breaking in these compounds is driven by the rotational degree of freedom of the organic cations, which determine the hydrogen bonding pattern that links the organic and inorganic layers.
Databáze: OpenAIRE
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