Citation: Shuyan ZHAO. Field-induced Co^Ⅱ single-ion magnet with pentagonal bipyramidal configuration[J]. Chinese Journal of Inorganic Chemistry, ;2024, 40(8): 1583-1591. doi: 10.11862/CJIC.20240231 shu

Field-induced Co^Ⅱ single-ion magnet with pentagonal bipyramidal configuration

Shuyan ZHAO ^,

Chengde Nursing Vocational College, Chengde, Hebei 067000, China

Corresponding author: Shuyan ZHAO, 421650043@qq.com
Received Date: 21 June 2024
Revised Date: 18 July 2024

Figures(6)

A mononuclear Co^Ⅱ complex, [Co(H₂dapsc)(H₂O)Cl]Cl·2H₂O (1), with a pentagonal bipyramidal configuration was obtained by reflux reaction of CoCl₂·6H₂O and 2, 6-diacetylpyridine-bis(semicarbazone) (H₂dapsc) in a mixed solvent of water and ethanol. The neutral ligand H₂dapsc molecule provides five coordination atoms to form the equatorial plane of 1, while a water molecule and a Cl^- ion occupy their axial positions. At the same time, the solid structure contains a valence counteranion Cl^- ion and two lattice water molecules. The study of DC magnetic susceptibility indicates that complex 1 has strong magnetic anisotropy. The AC magnetic properties show the existence of slow magnetic relaxation behavior, which is dominated by both direct and Raman processes. The energy barrier for magnetization reversal was 55.55 K. Based on theoretical calculations, it can be concluded that the main reason for the slow magnetic relaxation behavior is the rhombic anisotropy of the pentagonal bipyramidal structure. The calculated D and E values were 45.68 and-0.32 cm^-1.
- Co^Ⅱ complex,
- pentagonal bipyramid,
- crystal structure,
- magnetic property
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Field-induced CoⅡ single-ion magnet with pentagonal bipyramidal configuration

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Field-induced Co^Ⅱ single-ion magnet with pentagonal bipyramidal configuration