Weak ferromagnetism derived from spin canting in an amido-bridged homochiral Mn() 1-D coordination polymer

• Published in: Dalton transactions : an international journal of inorganic chemistry Vol. 48; no. 24; pp. 8617 - 8622
• Main Authors: Kusumoto, Sotaro, Koga, Atsushi, Kobayashi, Fumiya, Ohtani, Ryo, Kim, Yang, Lindoy, Leonard F, Hayami, Shinya, Nakamura, Masaaki
• Format: Journal Article
• Language: English
• Published: England Royal Society of Chemistry 2019
• Subjects: Antiferromagnetism; Benzamide; Chemical synthesis; Coercivity; Coordination polymers; Crystal structure; Crystallography; Ferromagnetism; Filing; Ligands; Magnetic properties; Magnetism; Manganese; Phase transitions; Polymers
• ISSN: 1477-9226; 1477-9234
• DOI: 10.1039/c9dt00593e

A homochiral one-dimensional (1D) Mn( iii ) coordination polymer [MnL] n ( 1 ) was synthesised employing the N 3 O-donor tetradentate ligand (L = 2-hydroxy- N -[2-[[(2-aminophenyl)methylene]amino]-2-methylpropyl]-benzamide). The X-ray structure of 1 and its magnetic properties were investigated in detail. The crystal structure of 1 shows a homochiral helical arrangement in which spontaneous resolution has occurred, despite the ligand being achiral. Magnetic characterization revealed an antiferromagnetic interaction between manganese( iii ) ions ( J = −2.48 cm −1 , g = 1.96) that leads to an antiferromagnetic spin-ordering phase transition at T N 7 K. Noteworthily, 1 exhibits weak ferromagnetism with a relatively large coercive field of 3.0 kOe based on the spin canting, indicating the formation of a homochiral weak ferromagnet. An amido-bridged homochiral one-dimensional (1D) Mn( iii ) coordination polymer behaves as a weak ferromagnet arising from spin canting with a coercive field of 3.0 kOe.