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Updated: Aug 6, 2026
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Published on: June 7, 2018
Supramolecular Co(II)-[2 x 2] grids: metamagnetic behavior in a single molecule
Oliver Waldmann1, Mario Ruben, Ulrich Ziener
1Physikalisches Institut III, Universität Erlangen-Nürnberg, 91058 Erlangen, Germany. waldmann@iac.unibe.ch
Abstract:
The magnetic anisotropy of the supramolecular [2 x 2] grid [Co(II)4L4]8+, with a bis(bipyridyl)-pyrimidine-based ligand L, was investigated by single-crystal magnetization measurements at low temperatures. The magnetization curves exhibit metamagnetic-like behavior and are explained by the weak-exchange limit of a minimal spin Hamiltonian including Heisenberg exchange, easy-axis ligand fields, and the Zeeman term. It is also shown that the magnetic coupling strength can be varied by the substituent R1 in the two-position on the central pyrimidine group of the ligand L.
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