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Supramolecular Co(II)-[2 x 2] grids: metamagnetic behavior in a single molecule.

Authors
Type
Published Article
Journal
Inorganic chemistry
Publication Date
Volume
45
Issue
16
Pages
6535–6540
Identifiers
PMID: 16878968
Source
Medline
License
Unknown

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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