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Magnetic properties of lanthanide complexes with nitronyl nitroxides.

DOI

121

Citations

0

References

1989

Year

Cristiano Benelli, Andréa Caneschi, Dante Gatteschi, Luca Pardi, P. Rey, D. Shum, Richard L. Carlin
Inorganic Chemistry

Abstract

Europium(II1) and gadolinium(II1) hexafluoroacetylacetonates, M(hfac),, form stable bis adducts with nitronyl nitroxides (2-\nR-4,4,5,5-tetramethyl-4,5-dihyd1rHo-- imidazolyl-1-oxy13 -oxide, NITR; R = phenyl, ethyl). The magnetic properties of Gd-\n(hfac),(NITPh), were investigated in the range 1.1-300 K, while all the other compounds were studied in the range 4-300 K.\nThe gadolinium(II1) ions were found to be weakly coupled in a ferromagnetic fashion to the radical, while the radicals are\nantiferromagnetically coupled to each other. The possible mechanisms responsible for this behavior are discussed.