Unveiling new [1+1] Schiff-base macrocycles towards high energy-barrier hexagonal bipyramidal Dy(III) single-molecule magnets.

Autor: Armenis, Alexandros S., Mondal, Arpan, Giblin, Sean R., Raptopoulou, Catherine P., Psycharis, Vassilis, Alexandropoulos, Dimitris I., Tang, Jinkui, Layfield, Richard A., Stamatatos, Theocharis C.
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Zdroj: Chemical Communications; 11/11/2024, Vol. 60 Issue 87, p12730-12733, 4p
Abstrakt: The employment of the [1+1] condensation approach for the preparation of new macrocyclic scaffolds (LN6 and LN3O3) towards high-performance Dy(III) single-molecule magnets (SMMs) with pseudo-D6h symmetry is described. Engineering of the macrocycles denticity from LN6 to LN3O3 leads to a mononuclear SMM with a large Ueff value of 1300 K. The experimental results are supported by ab initio calculations, which indicate relaxation of the magnetization via the second-excited state. [ABSTRACT FROM AUTHOR]
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