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HETEROTRISPIN COMPLEXES IN MOLECULAR MAGNTISM. SYNTHETIC STRATEGIES
The combination of different spin carriers is a valuable synthetic strategy to obtain molecular magnetic materials. Indeed, most of the 3-D molecule-based magnets and Single Chain Magnets (SCMs), as well as numerous Single Molecule Magnets (SMMs) are 3d-nd, nd-4f, 2p-nd, and 2p-4f heterobispin complexes. As far as the heterotrispin systems are concerned, they are less numerous. Such compounds contain either three different paramagnetic ions,1 or two different paramagnetic ions and an organic radical (2p).2 We currently develop new synthetic strategies leading to SMMs and SCMs, which are based on the combination of three different spin carriers (nd and 4f transition metal ions, as well as 2p or 3p radicals). The synthetic approach consists of self-assembly processes involving high spin anisotropic oligonuclear complexes (nodes) and various paramagnetic metalloligands (spacers).
In this lecture I will present our recent and most representative examples of heterotrimetallic complexes with relevance in molecular magnetism (3d-3d’-3d’’, 3d-3d’-4f, 3d-4d-4f, 3d-5d-4f, 2p-3d-4f). They show a rich structural variety (discrete polymetallic entities, as well as coordination polymers) and interesting magnetic properties.
- M. Andruh, Chem. Commun., 2018, 54, 3559.
- M. G. F. Vaz, M. Andruh, Coord. Chem. Rev., 2021, 427, 213611.