Insertion of single-ion magnets based on mononuclear Co(II) complexes into ferromagnetic oxalate-based networks

The 1:2 and 1:1 Co(II) complexes of the L ligand (L = 6-(3,5-diamino-2,4,6-triazinyl)2,2'-bipyridine) with formulas [Co-II(L)(2)](ClO4)(2)center dot 0.5MeCN center dot Et2O (1) and [Co-II(L)(CH3CN)(2)(H2O)](ClO4)(2)center dot MeCN (2) have been prepared. The structural and magnetic characterization of the two compounds shows that they contain octahedral high-spin Co(II) and present a field-induced slow relaxation of the magnetization. 1 has been inserted into a bimetallic oxalate-based network leading to a novel achiral 3D compound of formula [Co-II(L)(2)][(MnCrIII)-Cr-II(ox)(3)](2)center dot(solvate) (3) exhibiting ferromagnetic ordering below 4.6 K. EPR measurements suggest a weak magnetic coupling between the two sublattices.

Automated summary

The 1:2 and 1:1 Co(II) complexes of the L ligand have been synthesized and characterized for their structural and magnetic properties, showing octahedral high-spin Co(II) and field-induced slow relaxation of magnetization; one of the compounds has been incorporated into a bimetallic oxalate-based network leading to a novel 3D compound with ferromagnetic ordering, with EPR measurements suggesting weak magnetic coupling between the two sublattices.