期刊
INORGANICA CHIMICA ACTA
卷 543, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.ica.2022.121200
关键词
Binuclear cobalt compound; Single -molecule magnet; Crystal structure
资金
- Major Project of Science and Technology, Education Department of Henan Province [22A150006]
- National Natural Science Foundation of China [22071043, 22203027]
A binuclear cobalt compound with a six-coordinated geometry was synthesized, showing excellent performance in direct-current and alternating-current magnetic properties.
A binuclear cobalt compound, namely, [Co2(L)2Cl2(H2O)4].2Cl.2H2O (1), was synthesized by acylhydrazone Schiff base ligand N3-(4-pyridyl)-4-hydroxybenzoylhydrazone (HL) and CoCl2.6H2O. The crystal structure study suggests that each CoII ion in 1 is surrounded by two nitrogen atoms and one oxygen atom from ligand, one chloride ion and two oxygen atoms from two water molecules, giving rise to six-coordinated geometry, where two N atoms from two ligands as bridges link two CoII ions. The direct-current (dc) magnetic susceptibility measurements reveal the existence of antiferromagnetic coupling interaction in 1. The alternating-current (ac) magnetic susceptibility measurements indicate that 1 exhibits field-induced slow magnetic relaxation behavior with energy barrier (Ueff) of 51.80 K, standing out among Co2-SMMs. This study demonstrates that the large magnetic anisotropy of each CoII ion and the weak antiferromagnetic coupling interaction between two CoII ions can improve Co2-SMMs performance effectively.
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