Synthesis of Low-Symmetric α-Cobalt(II) Hydroxide-Incorporated Cyanuric Acid Layers with High Néel Temperature and Large Coercivity: Structure and Magnetism

Qi Wang; Jun-Rong Meng; Yi-Fan Shen; Ri-Hui Zheng; Hongdan Zhu; Peng-Fei Yao; Qian Peng; Quan-Wen Li

doi:10.1021/acs.inorgchem.4c03201

Synthesis of Low-Symmetric α-Cobalt(II) Hydroxide-Incorporated Cyanuric Acid Layers with High Néel Temperature and Large Coercivity: Structure and Magnetism

Inorg Chem. 2024 Sep 23;63(38):17914-17920. doi: 10.1021/acs.inorgchem.4c03201. Epub 2024 Sep 11.

Authors

Qi Wang¹, Jun-Rong Meng², Yi-Fan Shen², Ri-Hui Zheng², Hongdan Zhu¹, Peng-Fei Yao^{1

2}, Qian Peng¹, Quan-Wen Li¹

Affiliations

¹ State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, School of Materials Science and Engineering, Nankai University, Tianjin 300071, China.
² Guangxi Key Laboratory of Urban Water Environment, College of Chemistry and Environmental Engineering, Baise University, Baise, Guangxi 533000, China.

PMID: 39258333
DOI: 10.1021/acs.inorgchem.4c03201

Abstract

α-Cobalt(II) (Co^II) hydroxide (compound 1) incorporating cyanuric acid layers was synthesized via the solvothermal method. 1 exhibited two distinct characteristics, which were different from reported α-Co^II hydroxides. (i) The presence of abundant consecutive hydrogen bonds between the adjacent hydroxide layers enhanced the driving force of crystallization along the direction of the c axis. Thus, 1 revealed high crystallinity without the disorder phenomenon. (ii) 1 showed low symmetry. The configuration of Co^Td sites did not follow the regular triangular net. The low symmetry favored the magnetic anisotropy. Thus, 1 revealed ferrimagnetic behavior with a high Néel temperature (T_N = 56.8 K) and coercivity (H_c = 36 kOe at 2 K). The ferrimagnetic behavior of 1 was validated via the Hubbard U correction density functional theory.