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Issue 20, 2020
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Effects of ligand substituents on the single-molecule magnetic behavior of quinonoid-bridged dicobalt compounds

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Abstract

A series of quinonoid-bridged dicobalt compounds [(N4Co)2LX](ClO4)2 (1–4) (X = H, Cl, Br and OMe; N4 = 1,4,7,10-tetrabenzyl-1,4,7,10-tetraazacyclododecane) are synthesized and well characterized. Single crystal X-ray diffraction analyses reveal that the coordination geometry of one side Co in compounds 1–4 changes from a triangular prism to distorted octahedron with a change in the bridged-ligand substituent. Magnetic measurements show that compounds 1 and 3 exhibit single-molecule magnetic behavior. Magneto-structural analyses indicate that the difference in the relaxation barrier U between the four compounds results from the different orientations of the anisotropy axes of the two Co centers in the molecule.

Graphical abstract: Effects of ligand substituents on the single-molecule magnetic behavior of quinonoid-bridged dicobalt compounds

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Supplementary files

Article information


Submitted
05 Jan 2020
Accepted
21 Apr 2020
First published
23 Apr 2020

Dalton Trans., 2020,49, 6738-6743
Article type
Paper

Effects of ligand substituents on the single-molecule magnetic behavior of quinonoid-bridged dicobalt compounds

X. Zhu, W. Cao, S. Su, X. Wu and T. Sheng, Dalton Trans., 2020, 49, 6738
DOI: 10.1039/D0DT00033G

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